diff --git a/compatibility_matrices/compatibility_matrix.9.xml b/compatibility_matrices/compatibility_matrix.9.xml
index 0928f14..cf72202 100644
--- a/compatibility_matrices/compatibility_matrix.9.xml
+++ b/compatibility_matrices/compatibility_matrix.9.xml
@@ -216,7 +216,7 @@
     </hal>
     <hal format="aidl" optional="true">
         <name>android.hardware.gnss</name>
-        <version>2-3</version>
+        <version>2-4</version>
         <interface>
             <name>IGnss</name>
             <instance>default</instance>
diff --git a/gnss/1.1/default/Android.bp b/gnss/1.1/default/Android.bp
index 300e8de..697cb91 100644
--- a/gnss/1.1/default/Android.bp
+++ b/gnss/1.1/default/Android.bp
@@ -27,7 +27,7 @@
         "android.hardware.gnss@2.0",
         "android.hardware.gnss@1.1",
         "android.hardware.gnss@1.0",
-        "android.hardware.gnss-V3-ndk",
+        "android.hardware.gnss-V4-ndk",
     ],
     static_libs: [
         "android.hardware.gnss@common-default-lib",
diff --git a/gnss/1.1/vts/functional/Android.bp b/gnss/1.1/vts/functional/Android.bp
index 2414cbc..f9fcbf1 100644
--- a/gnss/1.1/vts/functional/Android.bp
+++ b/gnss/1.1/vts/functional/Android.bp
@@ -36,7 +36,7 @@
         "android.hardware.gnss@1.1",
         "android.hardware.gnss@2.0",
         "android.hardware.gnss@common-vts-lib",
-        "android.hardware.gnss-V3-cpp",
+        "android.hardware.gnss-V4-cpp",
     ],
     shared_libs: [
         "android.hardware.gnss.measurement_corrections@1.0",
diff --git a/gnss/2.0/default/Android.bp b/gnss/2.0/default/Android.bp
index 83bc2cc..35c2e37 100644
--- a/gnss/2.0/default/Android.bp
+++ b/gnss/2.0/default/Android.bp
@@ -50,7 +50,7 @@
         "android.hardware.gnss@2.0",
         "android.hardware.gnss@1.1",
         "android.hardware.gnss@1.0",
-        "android.hardware.gnss-V3-ndk",
+        "android.hardware.gnss-V4-ndk",
     ],
     static_libs: [
         "android.hardware.gnss@common-default-lib",
diff --git a/gnss/2.0/vts/functional/Android.bp b/gnss/2.0/vts/functional/Android.bp
index e8db886..0b54308 100644
--- a/gnss/2.0/vts/functional/Android.bp
+++ b/gnss/2.0/vts/functional/Android.bp
@@ -39,7 +39,7 @@
         "android.hardware.gnss@2.0",
         "android.hardware.gnss@2.1",
         "android.hardware.gnss@common-vts-lib",
-        "android.hardware.gnss-V3-cpp",
+        "android.hardware.gnss-V4-cpp",
     ],
     test_suites: [
         "general-tests",
diff --git a/gnss/2.1/default/Android.bp b/gnss/2.1/default/Android.bp
index 4a4ce54..1bb7512 100644
--- a/gnss/2.1/default/Android.bp
+++ b/gnss/2.1/default/Android.bp
@@ -44,7 +44,7 @@
         "android.hardware.gnss@1.0",
         "android.hardware.gnss@1.1",
         "android.hardware.gnss@2.0",
-        "android.hardware.gnss-V3-ndk",
+        "android.hardware.gnss-V4-ndk",
     ],
     static_libs: [
         "android.hardware.gnss@common-default-lib",
diff --git a/gnss/2.1/vts/functional/Android.bp b/gnss/2.1/vts/functional/Android.bp
index 76f9d07..9906b27 100644
--- a/gnss/2.1/vts/functional/Android.bp
+++ b/gnss/2.1/vts/functional/Android.bp
@@ -40,7 +40,7 @@
         "android.hardware.gnss@2.0",
         "android.hardware.gnss@2.1",
         "android.hardware.gnss@common-vts-lib",
-        "android.hardware.gnss-V3-cpp",
+        "android.hardware.gnss-V4-cpp",
     ],
     shared_libs: [
         "libvintf",
diff --git a/gnss/aidl/Android.bp b/gnss/aidl/Android.bp
index cb2c001..611c7e0 100644
--- a/gnss/aidl/Android.bp
+++ b/gnss/aidl/Android.bp
@@ -52,6 +52,6 @@
         },
 
     ],
-    frozen: true,
+    frozen: false,
 
 }
diff --git a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/ElapsedRealtime.aidl b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/ElapsedRealtime.aidl
index 559ed29..5d7f51e 100644
--- a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/ElapsedRealtime.aidl
+++ b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/ElapsedRealtime.aidl
@@ -38,6 +38,6 @@
   int flags;
   long timestampNs;
   double timeUncertaintyNs;
-  const int HAS_TIMESTAMP_NS = 1;
-  const int HAS_TIME_UNCERTAINTY_NS = 2;
+  const int HAS_TIMESTAMP_NS = (1 << 0) /* 1 */;
+  const int HAS_TIME_UNCERTAINTY_NS = (1 << 1) /* 2 */;
 }
diff --git a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/GnssClock.aidl b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/GnssClock.aidl
index a8454dd..63edd44 100644
--- a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/GnssClock.aidl
+++ b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/GnssClock.aidl
@@ -46,11 +46,11 @@
   double driftUncertaintyNsps;
   int hwClockDiscontinuityCount;
   android.hardware.gnss.GnssSignalType referenceSignalTypeForIsb;
-  const int HAS_LEAP_SECOND = 1;
-  const int HAS_TIME_UNCERTAINTY = 2;
-  const int HAS_FULL_BIAS = 4;
-  const int HAS_BIAS = 8;
-  const int HAS_BIAS_UNCERTAINTY = 16;
-  const int HAS_DRIFT = 32;
-  const int HAS_DRIFT_UNCERTAINTY = 64;
+  const int HAS_LEAP_SECOND = (1 << 0) /* 1 */;
+  const int HAS_TIME_UNCERTAINTY = (1 << 1) /* 2 */;
+  const int HAS_FULL_BIAS = (1 << 2) /* 4 */;
+  const int HAS_BIAS = (1 << 3) /* 8 */;
+  const int HAS_BIAS_UNCERTAINTY = (1 << 4) /* 16 */;
+  const int HAS_DRIFT = (1 << 5) /* 32 */;
+  const int HAS_DRIFT_UNCERTAINTY = (1 << 6) /* 64 */;
 }
diff --git a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/GnssLocation.aidl b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/GnssLocation.aidl
index ed9dcfa..e64d98a 100644
--- a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/GnssLocation.aidl
+++ b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/GnssLocation.aidl
@@ -47,12 +47,12 @@
   double bearingAccuracyDegrees;
   long timestampMillis;
   android.hardware.gnss.ElapsedRealtime elapsedRealtime;
-  const int HAS_LAT_LONG = 1;
-  const int HAS_ALTITUDE = 2;
-  const int HAS_SPEED = 4;
-  const int HAS_BEARING = 8;
-  const int HAS_HORIZONTAL_ACCURACY = 16;
-  const int HAS_VERTICAL_ACCURACY = 32;
-  const int HAS_SPEED_ACCURACY = 64;
-  const int HAS_BEARING_ACCURACY = 128;
+  const int HAS_LAT_LONG = 0x0001;
+  const int HAS_ALTITUDE = 0x0002;
+  const int HAS_SPEED = 0x0004;
+  const int HAS_BEARING = 0x0008;
+  const int HAS_HORIZONTAL_ACCURACY = 0x0010;
+  const int HAS_VERTICAL_ACCURACY = 0x0020;
+  const int HAS_SPEED_ACCURACY = 0x0040;
+  const int HAS_BEARING_ACCURACY = 0x0080;
 }
diff --git a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/GnssMeasurement.aidl b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/GnssMeasurement.aidl
index 8a44887..a2594af 100644
--- a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/GnssMeasurement.aidl
+++ b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/GnssMeasurement.aidl
@@ -61,39 +61,39 @@
   double satelliteInterSignalBiasUncertaintyNs;
   android.hardware.gnss.SatellitePvt satellitePvt;
   android.hardware.gnss.CorrelationVector[] correlationVectors;
-  const int HAS_SNR = 1;
-  const int HAS_CARRIER_FREQUENCY = 512;
-  const int HAS_CARRIER_CYCLES = 1024;
-  const int HAS_CARRIER_PHASE = 2048;
-  const int HAS_CARRIER_PHASE_UNCERTAINTY = 4096;
-  const int HAS_AUTOMATIC_GAIN_CONTROL = 8192;
-  const int HAS_FULL_ISB = 65536;
-  const int HAS_FULL_ISB_UNCERTAINTY = 131072;
-  const int HAS_SATELLITE_ISB = 262144;
-  const int HAS_SATELLITE_ISB_UNCERTAINTY = 524288;
-  const int HAS_SATELLITE_PVT = 1048576;
-  const int HAS_CORRELATION_VECTOR = 2097152;
+  const int HAS_SNR = (1 << 0) /* 1 */;
+  const int HAS_CARRIER_FREQUENCY = (1 << 9) /* 512 */;
+  const int HAS_CARRIER_CYCLES = (1 << 10) /* 1024 */;
+  const int HAS_CARRIER_PHASE = (1 << 11) /* 2048 */;
+  const int HAS_CARRIER_PHASE_UNCERTAINTY = (1 << 12) /* 4096 */;
+  const int HAS_AUTOMATIC_GAIN_CONTROL = (1 << 13) /* 8192 */;
+  const int HAS_FULL_ISB = (1 << 16) /* 65536 */;
+  const int HAS_FULL_ISB_UNCERTAINTY = (1 << 17) /* 131072 */;
+  const int HAS_SATELLITE_ISB = (1 << 18) /* 262144 */;
+  const int HAS_SATELLITE_ISB_UNCERTAINTY = (1 << 19) /* 524288 */;
+  const int HAS_SATELLITE_PVT = (1 << 20) /* 1048576 */;
+  const int HAS_CORRELATION_VECTOR = (1 << 21) /* 2097152 */;
   const int STATE_UNKNOWN = 0;
-  const int STATE_CODE_LOCK = 1;
-  const int STATE_BIT_SYNC = 2;
-  const int STATE_SUBFRAME_SYNC = 4;
-  const int STATE_TOW_DECODED = 8;
-  const int STATE_MSEC_AMBIGUOUS = 16;
-  const int STATE_SYMBOL_SYNC = 32;
-  const int STATE_GLO_STRING_SYNC = 64;
-  const int STATE_GLO_TOD_DECODED = 128;
-  const int STATE_BDS_D2_BIT_SYNC = 256;
-  const int STATE_BDS_D2_SUBFRAME_SYNC = 512;
-  const int STATE_GAL_E1BC_CODE_LOCK = 1024;
-  const int STATE_GAL_E1C_2ND_CODE_LOCK = 2048;
-  const int STATE_GAL_E1B_PAGE_SYNC = 4096;
-  const int STATE_SBAS_SYNC = 8192;
-  const int STATE_TOW_KNOWN = 16384;
-  const int STATE_GLO_TOD_KNOWN = 32768;
-  const int STATE_2ND_CODE_LOCK = 65536;
+  const int STATE_CODE_LOCK = (1 << 0) /* 1 */;
+  const int STATE_BIT_SYNC = (1 << 1) /* 2 */;
+  const int STATE_SUBFRAME_SYNC = (1 << 2) /* 4 */;
+  const int STATE_TOW_DECODED = (1 << 3) /* 8 */;
+  const int STATE_MSEC_AMBIGUOUS = (1 << 4) /* 16 */;
+  const int STATE_SYMBOL_SYNC = (1 << 5) /* 32 */;
+  const int STATE_GLO_STRING_SYNC = (1 << 6) /* 64 */;
+  const int STATE_GLO_TOD_DECODED = (1 << 7) /* 128 */;
+  const int STATE_BDS_D2_BIT_SYNC = (1 << 8) /* 256 */;
+  const int STATE_BDS_D2_SUBFRAME_SYNC = (1 << 9) /* 512 */;
+  const int STATE_GAL_E1BC_CODE_LOCK = (1 << 10) /* 1024 */;
+  const int STATE_GAL_E1C_2ND_CODE_LOCK = (1 << 11) /* 2048 */;
+  const int STATE_GAL_E1B_PAGE_SYNC = (1 << 12) /* 4096 */;
+  const int STATE_SBAS_SYNC = (1 << 13) /* 8192 */;
+  const int STATE_TOW_KNOWN = (1 << 14) /* 16384 */;
+  const int STATE_GLO_TOD_KNOWN = (1 << 15) /* 32768 */;
+  const int STATE_2ND_CODE_LOCK = (1 << 16) /* 65536 */;
   const int ADR_STATE_UNKNOWN = 0;
-  const int ADR_STATE_VALID = 1;
-  const int ADR_STATE_RESET = 2;
-  const int ADR_STATE_CYCLE_SLIP = 4;
-  const int ADR_STATE_HALF_CYCLE_RESOLVED = 8;
+  const int ADR_STATE_VALID = (1 << 0) /* 1 */;
+  const int ADR_STATE_RESET = (1 << 1) /* 2 */;
+  const int ADR_STATE_CYCLE_SLIP = (1 << 2) /* 4 */;
+  const int ADR_STATE_HALF_CYCLE_RESOLVED = (1 << 3) /* 8 */;
 }
diff --git a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/GnssSignalType.aidl b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/GnssSignalType.aidl
index 4a49547..a17f933 100644
--- a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/GnssSignalType.aidl
+++ b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/GnssSignalType.aidl
@@ -42,6 +42,7 @@
   const @utf8InCpp String CODE_TYPE_B = "B";
   const @utf8InCpp String CODE_TYPE_C = "C";
   const @utf8InCpp String CODE_TYPE_D = "D";
+  const @utf8InCpp String CODE_TYPE_E = "E";
   const @utf8InCpp String CODE_TYPE_I = "I";
   const @utf8InCpp String CODE_TYPE_L = "L";
   const @utf8InCpp String CODE_TYPE_M = "M";
diff --git a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IAGnssRil.aidl b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IAGnssRil.aidl
index c782b6f..c8634ec 100644
--- a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IAGnssRil.aidl
+++ b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IAGnssRil.aidl
@@ -40,8 +40,8 @@
   void setSetId(in android.hardware.gnss.IAGnssRil.SetIdType type, in @utf8InCpp String setid);
   void updateNetworkState(in android.hardware.gnss.IAGnssRil.NetworkAttributes attributes);
   void injectNiSuplMessageData(in byte[] msgData, in int slotIndex);
-  const int NETWORK_CAPABILITY_NOT_METERED = 1;
-  const int NETWORK_CAPABILITY_NOT_ROAMING = 2;
+  const int NETWORK_CAPABILITY_NOT_METERED = 0x01;
+  const int NETWORK_CAPABILITY_NOT_ROAMING = 0x02;
   @Backing(type="int") @VintfStability
   enum AGnssRefLocationType {
     GSM_CELLID = 1,
diff --git a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IGnss.aidl b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IGnss.aidl
index 0e6405e..d1aaf2c 100644
--- a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IGnss.aidl
+++ b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IGnss.aidl
@@ -77,19 +77,19 @@
   }
   @Backing(type="int") @VintfStability
   enum GnssAidingData {
-    EPHEMERIS = 1,
-    ALMANAC = 2,
-    POSITION = 4,
-    TIME = 8,
-    IONO = 16,
-    UTC = 32,
-    HEALTH = 64,
-    SVDIR = 128,
-    SVSTEER = 256,
-    SADATA = 512,
-    RTI = 1024,
-    CELLDB_INFO = 32768,
-    ALL = 65535,
+    EPHEMERIS = 0x0001,
+    ALMANAC = 0x0002,
+    POSITION = 0x0004,
+    TIME = 0x0008,
+    IONO = 0x0010,
+    UTC = 0x0020,
+    HEALTH = 0x0040,
+    SVDIR = 0x0080,
+    SVSTEER = 0x0100,
+    SADATA = 0x0200,
+    RTI = 0x0400,
+    CELLDB_INFO = 0x8000,
+    ALL = 0xFFFF,
   }
   @VintfStability
   parcelable PositionModeOptions {
diff --git a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IGnssBatching.aidl b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IGnssBatching.aidl
index d82aa1f..a021f55 100644
--- a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IGnssBatching.aidl
+++ b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IGnssBatching.aidl
@@ -41,7 +41,7 @@
   void flush();
   void stop();
   void cleanup();
-  const int WAKEUP_ON_FIFO_FULL = 1;
+  const int WAKEUP_ON_FIFO_FULL = 0x01;
   @VintfStability
   parcelable Options {
     long periodNanos;
diff --git a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IGnssCallback.aidl b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IGnssCallback.aidl
index 0247182..61710d3 100644
--- a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IGnssCallback.aidl
+++ b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IGnssCallback.aidl
@@ -46,22 +46,22 @@
   void gnssRequestTimeCb();
   void gnssRequestLocationCb(in boolean independentFromGnss, in boolean isUserEmergency);
   void gnssSetSignalTypeCapabilitiesCb(in android.hardware.gnss.GnssSignalType[] gnssSignalTypes);
-  const int CAPABILITY_SCHEDULING = 1;
-  const int CAPABILITY_MSB = 2;
-  const int CAPABILITY_MSA = 4;
-  const int CAPABILITY_SINGLE_SHOT = 8;
-  const int CAPABILITY_ON_DEMAND_TIME = 16;
-  const int CAPABILITY_GEOFENCING = 32;
-  const int CAPABILITY_MEASUREMENTS = 64;
-  const int CAPABILITY_NAV_MESSAGES = 128;
-  const int CAPABILITY_LOW_POWER_MODE = 256;
-  const int CAPABILITY_SATELLITE_BLOCKLIST = 512;
-  const int CAPABILITY_MEASUREMENT_CORRECTIONS = 1024;
-  const int CAPABILITY_ANTENNA_INFO = 2048;
-  const int CAPABILITY_CORRELATION_VECTOR = 4096;
-  const int CAPABILITY_SATELLITE_PVT = 8192;
-  const int CAPABILITY_MEASUREMENT_CORRECTIONS_FOR_DRIVING = 16384;
-  const int CAPABILITY_ACCUMULATED_DELTA_RANGE = 32768;
+  const int CAPABILITY_SCHEDULING = (1 << 0) /* 1 */;
+  const int CAPABILITY_MSB = (1 << 1) /* 2 */;
+  const int CAPABILITY_MSA = (1 << 2) /* 4 */;
+  const int CAPABILITY_SINGLE_SHOT = (1 << 3) /* 8 */;
+  const int CAPABILITY_ON_DEMAND_TIME = (1 << 4) /* 16 */;
+  const int CAPABILITY_GEOFENCING = (1 << 5) /* 32 */;
+  const int CAPABILITY_MEASUREMENTS = (1 << 6) /* 64 */;
+  const int CAPABILITY_NAV_MESSAGES = (1 << 7) /* 128 */;
+  const int CAPABILITY_LOW_POWER_MODE = (1 << 8) /* 256 */;
+  const int CAPABILITY_SATELLITE_BLOCKLIST = (1 << 9) /* 512 */;
+  const int CAPABILITY_MEASUREMENT_CORRECTIONS = (1 << 10) /* 1024 */;
+  const int CAPABILITY_ANTENNA_INFO = (1 << 11) /* 2048 */;
+  const int CAPABILITY_CORRELATION_VECTOR = (1 << 12) /* 4096 */;
+  const int CAPABILITY_SATELLITE_PVT = (1 << 13) /* 8192 */;
+  const int CAPABILITY_MEASUREMENT_CORRECTIONS_FOR_DRIVING = (1 << 14) /* 16384 */;
+  const int CAPABILITY_ACCUMULATED_DELTA_RANGE = (1 << 15) /* 32768 */;
   @Backing(type="int") @VintfStability
   enum GnssStatusValue {
     NONE = 0,
@@ -73,10 +73,10 @@
   @Backing(type="int") @VintfStability
   enum GnssSvFlags {
     NONE = 0,
-    HAS_EPHEMERIS_DATA = 1,
-    HAS_ALMANAC_DATA = 2,
-    USED_IN_FIX = 4,
-    HAS_CARRIER_FREQUENCY = 8,
+    HAS_EPHEMERIS_DATA = (1 << 0) /* 1 */,
+    HAS_ALMANAC_DATA = (1 << 1) /* 2 */,
+    USED_IN_FIX = (1 << 2) /* 4 */,
+    HAS_CARRIER_FREQUENCY = (1 << 3) /* 8 */,
   }
   @VintfStability
   parcelable GnssSvInfo {
diff --git a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IGnssConfiguration.aidl b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IGnssConfiguration.aidl
index 1d6399e..70df11a 100644
--- a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IGnssConfiguration.aidl
+++ b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IGnssConfiguration.aidl
@@ -42,11 +42,11 @@
   void setEmergencySuplPdn(in boolean enable);
   void setEsExtensionSec(in int emergencyExtensionSeconds);
   void setBlocklist(in android.hardware.gnss.BlocklistedSource[] blocklist);
-  const int SUPL_MODE_MSB = 1;
-  const int SUPL_MODE_MSA = 2;
-  const int LPP_PROFILE_USER_PLANE = 1;
-  const int LPP_PROFILE_CONTROL_PLANE = 2;
-  const int GLONASS_POS_PROTOCOL_RRC_CPLANE = 1;
-  const int GLONASS_POS_PROTOCOL_RRLP_UPLANE = 2;
-  const int GLONASS_POS_PROTOCOL_LPP_UPLANE = 4;
+  const int SUPL_MODE_MSB = 0x01;
+  const int SUPL_MODE_MSA = 0x02;
+  const int LPP_PROFILE_USER_PLANE = 0x01;
+  const int LPP_PROFILE_CONTROL_PLANE = 0x02;
+  const int GLONASS_POS_PROTOCOL_RRC_CPLANE = 0x01;
+  const int GLONASS_POS_PROTOCOL_RRLP_UPLANE = 0x02;
+  const int GLONASS_POS_PROTOCOL_LPP_UPLANE = 0x04;
 }
diff --git a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IGnssGeofenceCallback.aidl b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IGnssGeofenceCallback.aidl
index df5dc2d..90f9ebc 100644
--- a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IGnssGeofenceCallback.aidl
+++ b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IGnssGeofenceCallback.aidl
@@ -41,15 +41,15 @@
   void gnssGeofenceRemoveCb(in int geofenceId, in int status);
   void gnssGeofencePauseCb(in int geofenceId, in int status);
   void gnssGeofenceResumeCb(in int geofenceId, in int status);
-  const int ENTERED = 1;
-  const int EXITED = 2;
-  const int UNCERTAIN = 4;
-  const int UNAVAILABLE = 1;
-  const int AVAILABLE = 2;
+  const int ENTERED = (1 << 0) /* 1 */;
+  const int EXITED = (1 << 1) /* 2 */;
+  const int UNCERTAIN = (1 << 2) /* 4 */;
+  const int UNAVAILABLE = (1 << 0) /* 1 */;
+  const int AVAILABLE = (1 << 1) /* 2 */;
   const int OPERATION_SUCCESS = 0;
-  const int ERROR_TOO_MANY_GEOFENCES = -100;
-  const int ERROR_ID_EXISTS = -101;
-  const int ERROR_ID_UNKNOWN = -102;
-  const int ERROR_INVALID_TRANSITION = -103;
-  const int ERROR_GENERIC = -149;
+  const int ERROR_TOO_MANY_GEOFENCES = (-100) /* -100 */;
+  const int ERROR_ID_EXISTS = (-101) /* -101 */;
+  const int ERROR_ID_UNKNOWN = (-102) /* -102 */;
+  const int ERROR_INVALID_TRANSITION = (-103) /* -103 */;
+  const int ERROR_GENERIC = (-149) /* -149 */;
 }
diff --git a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IGnssNavigationMessageCallback.aidl b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IGnssNavigationMessageCallback.aidl
index c65cff2..57d0e68 100644
--- a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IGnssNavigationMessageCallback.aidl
+++ b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IGnssNavigationMessageCallback.aidl
@@ -44,26 +44,26 @@
     int messageId;
     int submessageId;
     byte[] data;
-    const int STATUS_PARITY_PASSED = 1;
-    const int STATUS_PARITY_REBUILT = 2;
+    const int STATUS_PARITY_PASSED = (1 << 0) /* 1 */;
+    const int STATUS_PARITY_REBUILT = (1 << 1) /* 2 */;
     const int STATUS_UNKNOWN = 0;
     @Backing(type="int") @VintfStability
     enum GnssNavigationMessageType {
       UNKNOWN = 0,
-      GPS_L1CA = 257,
-      GPS_L2CNAV = 258,
-      GPS_L5CNAV = 259,
-      SBS = 513,
-      GPS_CNAV2 = 260,
-      GLO_L1CA = 769,
-      QZS_L1CA = 1025,
-      BDS_D1 = 1281,
-      BDS_D2 = 1282,
-      BDS_CNAV1 = 1283,
-      BDS_CNAV2 = 1284,
-      GAL_I = 1537,
-      GAL_F = 1538,
-      IRN_L5CA = 1793,
+      GPS_L1CA = 0x0101,
+      GPS_L2CNAV = 0x0102,
+      GPS_L5CNAV = 0x0103,
+      SBS = 0x0201,
+      GPS_CNAV2 = 0x0104,
+      GLO_L1CA = 0x0301,
+      QZS_L1CA = 0x0401,
+      BDS_D1 = 0x0501,
+      BDS_D2 = 0x0502,
+      BDS_CNAV1 = 0x0503,
+      BDS_CNAV2 = 0x0504,
+      GAL_I = 0x0601,
+      GAL_F = 0x0602,
+      IRN_L5CA = 0x0701,
     }
   }
 }
diff --git a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IGnssPowerIndicationCallback.aidl b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IGnssPowerIndicationCallback.aidl
index d35c77f..07b10ad 100644
--- a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IGnssPowerIndicationCallback.aidl
+++ b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/IGnssPowerIndicationCallback.aidl
@@ -37,10 +37,10 @@
 interface IGnssPowerIndicationCallback {
   void setCapabilitiesCb(in int capabilities);
   oneway void gnssPowerStatsCb(in android.hardware.gnss.GnssPowerStats gnssPowerStats);
-  const int CAPABILITY_TOTAL = 1;
-  const int CAPABILITY_SINGLEBAND_TRACKING = 2;
-  const int CAPABILITY_MULTIBAND_TRACKING = 4;
-  const int CAPABILITY_SINGLEBAND_ACQUISITION = 8;
-  const int CAPABILITY_MULTIBAND_ACQUISITION = 16;
-  const int CAPABILITY_OTHER_MODES = 32;
+  const int CAPABILITY_TOTAL = (1 << 0) /* 1 */;
+  const int CAPABILITY_SINGLEBAND_TRACKING = (1 << 1) /* 2 */;
+  const int CAPABILITY_MULTIBAND_TRACKING = (1 << 2) /* 4 */;
+  const int CAPABILITY_SINGLEBAND_ACQUISITION = (1 << 3) /* 8 */;
+  const int CAPABILITY_MULTIBAND_ACQUISITION = (1 << 4) /* 16 */;
+  const int CAPABILITY_OTHER_MODES = (1 << 5) /* 32 */;
 }
diff --git a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/SatellitePvt.aidl b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/SatellitePvt.aidl
index 5fd411f..ae65f39 100644
--- a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/SatellitePvt.aidl
+++ b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/SatellitePvt.aidl
@@ -46,9 +46,9 @@
   long timeOfEphemerisSeconds;
   int issueOfDataEphemeris;
   android.hardware.gnss.SatellitePvt.SatelliteEphemerisSource ephemerisSource = android.hardware.gnss.SatellitePvt.SatelliteEphemerisSource.OTHER;
-  const int HAS_POSITION_VELOCITY_CLOCK_INFO = 1;
-  const int HAS_IONO = 2;
-  const int HAS_TROPO = 4;
+  const int HAS_POSITION_VELOCITY_CLOCK_INFO = (1 << 0) /* 1 */;
+  const int HAS_IONO = (1 << 1) /* 2 */;
+  const int HAS_TROPO = (1 << 2) /* 4 */;
   @Backing(type="int") @VintfStability
   enum SatelliteEphemerisSource {
     DEMODULATED = 0,
diff --git a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/measurement_corrections/IMeasurementCorrectionsCallback.aidl b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/measurement_corrections/IMeasurementCorrectionsCallback.aidl
index 4126702..61909d0 100644
--- a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/measurement_corrections/IMeasurementCorrectionsCallback.aidl
+++ b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/measurement_corrections/IMeasurementCorrectionsCallback.aidl
@@ -36,7 +36,7 @@
 @VintfStability
 interface IMeasurementCorrectionsCallback {
   void setCapabilitiesCb(in int capabilities);
-  const int CAPABILITY_LOS_SATS = 1;
-  const int CAPABILITY_EXCESS_PATH_LENGTH = 2;
-  const int CAPABILITY_REFLECTING_PLANE = 4;
+  const int CAPABILITY_LOS_SATS = (1 << 0) /* 1 */;
+  const int CAPABILITY_EXCESS_PATH_LENGTH = (1 << 1) /* 2 */;
+  const int CAPABILITY_REFLECTING_PLANE = (1 << 2) /* 4 */;
 }
diff --git a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/measurement_corrections/SingleSatCorrection.aidl b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/measurement_corrections/SingleSatCorrection.aidl
index ebbe684..72d32e4 100644
--- a/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/measurement_corrections/SingleSatCorrection.aidl
+++ b/gnss/aidl/aidl_api/android.hardware.gnss/current/android/hardware/gnss/measurement_corrections/SingleSatCorrection.aidl
@@ -44,10 +44,10 @@
   float combinedExcessPathLengthUncertaintyMeters;
   float combinedAttenuationDb;
   android.hardware.gnss.measurement_corrections.SingleSatCorrection.ExcessPathInfo[] excessPathInfos;
-  const int SINGLE_SAT_CORRECTION_HAS_SAT_IS_LOS_PROBABILITY = 1;
-  const int SINGLE_SAT_CORRECTION_HAS_COMBINED_EXCESS_PATH_LENGTH = 2;
-  const int SINGLE_SAT_CORRECTION_HAS_COMBINED_EXCESS_PATH_LENGTH_UNC = 4;
-  const int SINGLE_SAT_CORRECTION_HAS_COMBINED_ATTENUATION = 16;
+  const int SINGLE_SAT_CORRECTION_HAS_SAT_IS_LOS_PROBABILITY = 0x0001;
+  const int SINGLE_SAT_CORRECTION_HAS_COMBINED_EXCESS_PATH_LENGTH = 0x0002;
+  const int SINGLE_SAT_CORRECTION_HAS_COMBINED_EXCESS_PATH_LENGTH_UNC = 0x0004;
+  const int SINGLE_SAT_CORRECTION_HAS_COMBINED_ATTENUATION = 0x0010;
   @VintfStability
   parcelable ExcessPathInfo {
     int excessPathInfoFlags;
@@ -55,9 +55,9 @@
     float excessPathLengthUncertaintyMeters;
     android.hardware.gnss.measurement_corrections.ReflectingPlane reflectingPlane;
     float attenuationDb;
-    const int EXCESS_PATH_INFO_HAS_EXCESS_PATH_LENGTH = 1;
-    const int EXCESS_PATH_INFO_HAS_EXCESS_PATH_LENGTH_UNC = 2;
-    const int EXCESS_PATH_INFO_HAS_REFLECTING_PLANE = 4;
-    const int EXCESS_PATH_INFO_HAS_ATTENUATION = 8;
+    const int EXCESS_PATH_INFO_HAS_EXCESS_PATH_LENGTH = 0x0001;
+    const int EXCESS_PATH_INFO_HAS_EXCESS_PATH_LENGTH_UNC = 0x0002;
+    const int EXCESS_PATH_INFO_HAS_REFLECTING_PLANE = 0x0004;
+    const int EXCESS_PATH_INFO_HAS_ATTENUATION = 0x0008;
   }
 }
diff --git a/gnss/aidl/android/hardware/gnss/GnssSignalType.aidl b/gnss/aidl/android/hardware/gnss/GnssSignalType.aidl
index 241971f..c66d9e8 100644
--- a/gnss/aidl/android/hardware/gnss/GnssSignalType.aidl
+++ b/gnss/aidl/android/hardware/gnss/GnssSignalType.aidl
@@ -46,27 +46,36 @@
     double carrierFrequencyHz;
 
     /**
-     * GNSS signal code type "A" representing GALILEO E1A, GALILEO E6A, IRNSS L5A, IRNSS SA.
+     * GNSS signal code type "A" representing GALILEO E1A, GALILEO E6A, IRNSS L5A SPS, IRNSS SA SPS,
+     * GLONASS G1a L1OCd, GLONASS G2a L2CSI.
      */
     const @utf8InCpp String CODE_TYPE_A = "A";
 
     /**
-     * GNSS signal code type "B" representing GALILEO E1B, GALILEO E6B, IRNSS L5B, IRNSS SB.
+     * GNSS signal code type "B" representing GALILEO E1B, GALILEO E6B, IRNSS L5B RS (D),
+     * IRNSS SB RS (D), GLONASS G1a L1OCp, GLONASS G2a L2OCp, QZSS L1Sb.
      */
     const @utf8InCpp String CODE_TYPE_B = "B";
 
     /**
      * GNSS signal code type "C" representing GPS L1 C/A,  GPS L2 C/A, GLONASS G1 C/A,
-     * GLONASS G2 C/A, GALILEO E1C, GALILEO E6C, SBAS L1 C/A, QZSS L1 C/A, IRNSS L5C.
+     * GLONASS G2 C/A, GALILEO E1C, GALILEO E6C, SBAS L1 C/A, QZSS L1 C/A, IRNSS L5C RS (P),
+     * IRNSS SC RS (P).
      */
     const @utf8InCpp String CODE_TYPE_C = "C";
 
     /**
-     * GNSS signal code type "D" representing BDS B1C D.
+     * GNSS signal code type "D" representing GPS L2 (L1(C/A) + (P2-P1) (semi-codeless)),
+     * QZSS L5S(I), BDS B1C Data, BDS B2a Data, BDS B2b Data, BDS B2 (B2a+B2b) Data, BDS B3a Data.
      */
     const @utf8InCpp String CODE_TYPE_D = "D";
 
     /**
+     * GNSS signal code type "E" representing QZSS L1 C/B, QZSS L6E.
+     */
+    const @utf8InCpp String CODE_TYPE_E = "E";
+
+    /**
      * GNSS signal code type "I" representing GPS L5 I, GLONASS G3 I, GALILEO E5a I, GALILEO E5b I,
      * GALILEO E5a+b I, SBAS L5 I, QZSS L5 I, BDS B1 I, BDS B2 I, BDS B3 I.
      */
@@ -74,7 +83,7 @@
 
     /**
      * GNSS signal code type "L" representing GPS L1C (P), GPS L2C (L), QZSS L1C (P), QZSS L2C (L),
-     * LEX(6) L.
+     * QZSS L6P, BDS B1a Pilot.
      */
     const @utf8InCpp String CODE_TYPE_L = "L";
 
@@ -89,7 +98,9 @@
     const @utf8InCpp String CODE_TYPE_N = "N";
 
     /**
-     * GNSS signal code type "P" representing GPS L1P, GPS L2P, GLONASS G1P, GLONASS G2P, BDS B1C P.
+     * GNSS signal code type "P" representing GPS L1P, GPS L2P, GLONASS G1P, GLONASS G2P,
+     * BDS B1C Pilot, BDS B2a Pilot, BDS B2b Pilot, BDS B2 (B2a+B2b) Pilot, BDS B3a Pilot,
+     * QZSS L5S(Q).
      */
     const @utf8InCpp String CODE_TYPE_P = "P";
 
@@ -101,7 +112,7 @@
 
     /**
      * GNSS signal code type "S" represents GPS L1C (D), GPS L2C (M), QZSS L1C (D), QZSS L2C (M),
-     * LEX(6) S.
+     * QZSS L6D, BDS B1a Data.
      */
     const @utf8InCpp String CODE_TYPE_S = "S";
 
@@ -112,9 +123,11 @@
 
     /**
      * GNSS signal code type "X" representing GPS L1C (D+P), GPS L2C (M+L), GPS L5 (I+Q),
-     * GLONASS G3 (I+Q), GALILEO E1 (B+C), GALILEO E5a (I+Q), GALILEO E5b (I+Q), GALILEO E5a+b(I+Q),
-     * GALILEO E6 (B+C), SBAS L5 (I+Q), QZSS L1C (D+P), QZSS L2C (M+L), QZSS L5 (I+Q),
-     * LEX(6) (S+L), BDS B1 (I+Q), BDS B1C (D+P), BDS B2 (I+Q), BDS B3 (I+Q), IRNSS L5 (B+C).
+     * GLONASS G1a L1OCd+L1OCp, GLONASS G2a L2CSI+L2OCp, GLONASS G3 (I+Q), GALILEO E1 (B+C),
+     * GALILEO E5a (I+Q), GALILEO E5b (I+Q), GALILEO E5a+b (I+Q), GALILEO E6 (B+C), SBAS L5 (I+Q),
+     * QZSS L1C (D+P), QZSS L2C (M+L), QZSS L5 (I+Q), QZSS L6 (D+P), BDS B1 (I+Q),
+     * BDS B1C Data+Pilot, BDS B2a Data+Pilot, BDS B2 (I+Q), BDS B2 (B2a+B2b) Data+Pilot,
+     * BDS B3 (I+Q), IRNSS L5 (B+C), IRNSS S (B+C).
      */
     const @utf8InCpp String CODE_TYPE_X = "X";
 
@@ -124,7 +137,9 @@
     const @utf8InCpp String CODE_TYPE_Y = "Y";
 
     /**
-     * GNSS signal code type "Z" representing GALILEO E1 (A+B+C), GALILEO E6 (A+B+C), QZSS L1-SAIF.
+     * GNSS signal code type "Z" representing GALILEO E1 (A+B+C), GALILEO E6 (A+B+C),
+     * QZSS L1S/L1-SAIF, QZSS L5S (I+Q), QZSS L6 (D+E), BDS B1A Data+Pilot, BDS B2b Data+Pilot,
+     * BDS B3a Data+Pilot.
      */
     const @utf8InCpp String CODE_TYPE_Z = "Z";
 
@@ -142,10 +157,11 @@
      * The value is one of the constant Strings with prefix CODE_TYPE_ defined in this parcelable.
      *
      * This is used to specify the observation descriptor defined in GNSS Observation Data File
-     * Header Section Description in the RINEX standard (Version 3.XX). In RINEX Version 3.03,
-     * in Appendix Table A2 Attributes are listed as uppercase letters (for instance, "A" for
-     * "A channel"). In the future, if for instance a code "G" was added in the official RINEX
-     * standard, "G" could be specified here.
+     * Header Section Description in the RINEX standard (Version 4.00) e.g., in Tables 9-16 (see
+     * https://igs.org/wg/rinex/#documents-formats). In cases where the code type does not align
+     * with the above listed values, the code type from the most recent version of RINEX should be
+     * used. In the future, if for instance a code "G" was added in the official RINEX standard,
+     * "G" could be specified here.
      */
     @utf8InCpp String codeType;
 }
diff --git a/gnss/aidl/default/Android.bp b/gnss/aidl/default/Android.bp
index ca5a41f..542796f 100644
--- a/gnss/aidl/default/Android.bp
+++ b/gnss/aidl/default/Android.bp
@@ -50,7 +50,7 @@
         "android.hardware.gnss.measurement_corrections@1.1",
         "android.hardware.gnss.measurement_corrections@1.0",
         "android.hardware.gnss.visibility_control@1.0",
-        "android.hardware.gnss-V3-ndk",
+        "android.hardware.gnss-V4-ndk",
     ],
     srcs: [
         "AGnssRil.cpp",
diff --git a/gnss/aidl/default/gnss-default.xml b/gnss/aidl/default/gnss-default.xml
index 73b841e..c01069e 100644
--- a/gnss/aidl/default/gnss-default.xml
+++ b/gnss/aidl/default/gnss-default.xml
@@ -1,7 +1,7 @@
 <manifest version="1.0" type="device">
     <hal format="aidl">
         <name>android.hardware.gnss</name>
-        <version>3</version>
+        <version>4</version>
         <interface>
             <name>IGnss</name>
             <instance>default</instance>
diff --git a/gnss/aidl/vts/Android.bp b/gnss/aidl/vts/Android.bp
index 2a09a56..fd1d853 100644
--- a/gnss/aidl/vts/Android.bp
+++ b/gnss/aidl/vts/Android.bp
@@ -51,7 +51,7 @@
         "libbinder",
     ],
     static_libs: [
-        "android.hardware.gnss-V3-cpp",
+        "android.hardware.gnss-V4-cpp",
         "android.hardware.gnss@common-vts-lib",
     ],
     test_suites: [
diff --git a/gnss/common/utils/default/Android.bp b/gnss/common/utils/default/Android.bp
index 4cf17a6..208bc59 100644
--- a/gnss/common/utils/default/Android.bp
+++ b/gnss/common/utils/default/Android.bp
@@ -57,6 +57,6 @@
         "android.hardware.gnss@2.1",
         "android.hardware.gnss.measurement_corrections@1.1",
         "android.hardware.gnss.measurement_corrections@1.0",
-        "android.hardware.gnss-V3-ndk",
+        "android.hardware.gnss-V4-ndk",
     ],
 }
diff --git a/gnss/common/utils/vts/Android.bp b/gnss/common/utils/vts/Android.bp
index b5325b2..ed5674c 100644
--- a/gnss/common/utils/vts/Android.bp
+++ b/gnss/common/utils/vts/Android.bp
@@ -44,7 +44,7 @@
         "android.hardware.gnss@2.1",
         "android.hardware.gnss.measurement_corrections@1.0",
         "android.hardware.gnss.measurement_corrections@1.1",
-        "android.hardware.gnss-V3-cpp",
+        "android.hardware.gnss-V4-cpp",
     ],
     static_libs: [
         "libgtest",