diff --git a/gnss/1.1/default/Gnss.cpp b/gnss/1.1/default/Gnss.cpp
index 5043649..0d77ce4 100644
--- a/gnss/1.1/default/Gnss.cpp
+++ b/gnss/1.1/default/Gnss.cpp
@@ -1,9 +1,9 @@
 #define LOG_TAG "Gnss"
 
+#include "Gnss.h"
 #include <android/hardware/gnss/1.0/types.h>
 #include <log/log.h>
-
-#include "Gnss.h"
+#include "Constants.h"
 #include "GnssDebug.h"
 #include "GnssMeasurement.h"
 #include "Utils.h"
@@ -16,6 +16,7 @@
 
 using ::android::hardware::gnss::common::Utils;
 using GnssSvFlags = IGnssCallback::GnssSvFlags;
+using namespace ::android::hardware::gnss::common;
 
 const uint32_t MIN_INTERVAL_MILLIS = 100;
 sp<::android::hardware::gnss::V1_1::IGnssCallback> Gnss::sGnssCallback = nullptr;
@@ -197,14 +198,21 @@
 Return<GnssSvStatus> Gnss::getMockSvStatus() const {
     std::unique_lock<std::recursive_mutex> lock(mGnssConfiguration->getMutex());
     GnssSvInfo mockGnssSvInfoList[] = {
-            Utils::getMockSvInfoV1_0(3, GnssConstellationType::GPS, 32.5, 59.1, 166.5),
-            Utils::getMockSvInfoV1_0(5, GnssConstellationType::GPS, 27.0, 29.0, 56.5),
-            Utils::getMockSvInfoV1_0(17, GnssConstellationType::GPS, 30.5, 71.0, 77.0),
-            Utils::getMockSvInfoV1_0(26, GnssConstellationType::GPS, 24.1, 28.0, 253.0),
-            Utils::getMockSvInfoV1_0(5, GnssConstellationType::GLONASS, 20.5, 11.5, 116.0),
-            Utils::getMockSvInfoV1_0(17, GnssConstellationType::GLONASS, 21.5, 28.5, 186.0),
-            Utils::getMockSvInfoV1_0(18, GnssConstellationType::GLONASS, 28.3, 38.8, 69.0),
-            Utils::getMockSvInfoV1_0(10, GnssConstellationType::GLONASS, 25.0, 66.0, 247.0)};
+            Utils::getMockSvInfoV1_0(3, GnssConstellationType::GPS, 32.5, 59.1, 166.5,
+                                     kGpsL1FreqHz),
+            Utils::getMockSvInfoV1_0(5, GnssConstellationType::GPS, 27.0, 29.0, 56.5, kGpsL1FreqHz),
+            Utils::getMockSvInfoV1_0(17, GnssConstellationType::GPS, 30.5, 71.0, 77.0,
+                                     kGpsL5FreqHz),
+            Utils::getMockSvInfoV1_0(26, GnssConstellationType::GPS, 24.1, 28.0, 253.0,
+                                     kGpsL5FreqHz),
+            Utils::getMockSvInfoV1_0(5, GnssConstellationType::GLONASS, 20.5, 11.5, 116.0,
+                                     kGloG1FreqHz),
+            Utils::getMockSvInfoV1_0(17, GnssConstellationType::GLONASS, 21.5, 28.5, 186.0,
+                                     kGloG1FreqHz),
+            Utils::getMockSvInfoV1_0(18, GnssConstellationType::GLONASS, 28.3, 38.8, 69.0,
+                                     kGloG1FreqHz),
+            Utils::getMockSvInfoV1_0(10, GnssConstellationType::GLONASS, 25.0, 66.0, 247.0,
+                                     kGloG1FreqHz)};
 
     GnssSvStatus svStatus = {.numSvs = sizeof(mockGnssSvInfoList) / sizeof(GnssSvInfo)};
     for (uint32_t i = 0; i < svStatus.numSvs; i++) {
diff --git a/gnss/common/utils/default/Utils.cpp b/gnss/common/utils/default/Utils.cpp
index 569dac4..d136448 100644
--- a/gnss/common/utils/default/Utils.cpp
+++ b/gnss/common/utils/default/Utils.cpp
@@ -265,50 +265,50 @@
 }
 
 hidl_vec<GnssSvInfoV2_1> Utils::getMockSvInfoListV2_1() {
-    GnssSvInfoV1_0 gnssSvInfoV1_0 =
-            Utils::getMockSvInfoV1_0(3, V1_0::GnssConstellationType::GPS, 32.5, 59.1, 166.5);
+    GnssSvInfoV1_0 gnssSvInfoV1_0 = Utils::getMockSvInfoV1_0(3, V1_0::GnssConstellationType::GPS,
+                                                             32.5, 59.1, 166.5, kGpsL1FreqHz);
     GnssSvInfoV2_0 gnssSvInfoV2_0 =
             Utils::getMockSvInfoV2_0(gnssSvInfoV1_0, V2_0::GnssConstellationType::GPS);
     hidl_vec<GnssSvInfoV2_1> gnssSvInfoList = {
             Utils::getMockSvInfoV2_1(gnssSvInfoV2_0, 27.5),
             getMockSvInfoV2_1(
                     getMockSvInfoV2_0(getMockSvInfoV1_0(5, V1_0::GnssConstellationType::GPS, 27.0,
-                                                        29.0, 56.5),
+                                                        29.0, 56.5, kGpsL1FreqHz),
                                       V2_0::GnssConstellationType::GPS),
                     22.0),
             getMockSvInfoV2_1(
                     getMockSvInfoV2_0(getMockSvInfoV1_0(17, V1_0::GnssConstellationType::GPS, 30.5,
-                                                        71.0, 77.0),
+                                                        71.0, 77.0, kGpsL5FreqHz),
                                       V2_0::GnssConstellationType::GPS),
                     25.5),
             getMockSvInfoV2_1(
                     getMockSvInfoV2_0(getMockSvInfoV1_0(26, V1_0::GnssConstellationType::GPS, 24.1,
-                                                        28.0, 253.0),
+                                                        28.0, 253.0, kGpsL5FreqHz),
                                       V2_0::GnssConstellationType::GPS),
                     19.1),
             getMockSvInfoV2_1(
                     getMockSvInfoV2_0(getMockSvInfoV1_0(5, V1_0::GnssConstellationType::GLONASS,
-                                                        20.5, 11.5, 116.0),
+                                                        20.5, 11.5, 116.0, kGloG1FreqHz),
                                       V2_0::GnssConstellationType::GLONASS),
                     15.5),
             getMockSvInfoV2_1(
                     getMockSvInfoV2_0(getMockSvInfoV1_0(17, V1_0::GnssConstellationType::GLONASS,
-                                                        21.5, 28.5, 186.0),
+                                                        21.5, 28.5, 186.0, kGloG1FreqHz),
                                       V2_0::GnssConstellationType::GLONASS),
                     16.5),
             getMockSvInfoV2_1(
                     getMockSvInfoV2_0(getMockSvInfoV1_0(18, V1_0::GnssConstellationType::GLONASS,
-                                                        28.3, 38.8, 69.0),
+                                                        28.3, 38.8, 69.0, kGloG1FreqHz),
                                       V2_0::GnssConstellationType::GLONASS),
                     25.3),
             getMockSvInfoV2_1(
                     getMockSvInfoV2_0(getMockSvInfoV1_0(10, V1_0::GnssConstellationType::GLONASS,
-                                                        25.0, 66.0, 247.0),
+                                                        25.0, 66.0, 247.0, kGloG1FreqHz),
                                       V2_0::GnssConstellationType::GLONASS),
                     20.0),
             getMockSvInfoV2_1(
                     getMockSvInfoV2_0(getMockSvInfoV1_0(3, V1_0::GnssConstellationType::UNKNOWN,
-                                                        22.0, 35.0, 112.0),
+                                                        22.0, 35.0, 112.0, kIrnssL5FreqHz),
                                       V2_0::GnssConstellationType::IRNSS),
                     19.7),
     };
@@ -333,21 +333,23 @@
 }
 
 GnssSvInfoV1_0 Utils::getMockSvInfoV1_0(int16_t svid, V1_0::GnssConstellationType type,
-                                        float cN0DbHz, float elevationDegrees,
-                                        float azimuthDegrees) {
+                                        float cN0DbHz, float elevationDegrees, float azimuthDegrees,
+                                        float carrierFrequencyHz) {
     GnssSvInfoV1_0 svInfo = {.svid = svid,
                              .constellation = type,
                              .cN0Dbhz = cN0DbHz,
                              .elevationDegrees = elevationDegrees,
                              .azimuthDegrees = azimuthDegrees,
+                             .carrierFrequencyHz = carrierFrequencyHz,
                              .svFlag = GnssSvFlags::USED_IN_FIX | GnssSvFlags::HAS_EPHEMERIS_DATA |
-                                       GnssSvFlags::HAS_ALMANAC_DATA};
+                                       GnssSvFlags::HAS_ALMANAC_DATA |
+                                       GnssSvFlags::HAS_CARRIER_FREQUENCY};
     return svInfo;
 }
 
 hidl_vec<GnssAntennaInfo> Utils::getMockAntennaInfos() {
     GnssAntennaInfo mockAntennaInfo_1 = {
-            .carrierFrequencyMHz = 123412.12,
+            .carrierFrequencyMHz = kGpsL1FreqHz * 1e-6,
             .phaseCenterOffsetCoordinateMillimeters = Coord{.x = 1,
                                                             .xUncertainty = 0.1,
                                                             .y = 2,
@@ -381,7 +383,7 @@
     };
 
     GnssAntennaInfo mockAntennaInfo_2 = {
-            .carrierFrequencyMHz = 532324.23,
+            .carrierFrequencyMHz = kGpsL5FreqHz * 1e-6,
             .phaseCenterOffsetCoordinateMillimeters = Coord{.x = 5,
                                                             .xUncertainty = 0.1,
                                                             .y = 6,
diff --git a/gnss/common/utils/default/include/Constants.h b/gnss/common/utils/default/include/Constants.h
index a290ed2..22afee1 100644
--- a/gnss/common/utils/default/include/Constants.h
+++ b/gnss/common/utils/default/include/Constants.h
@@ -29,6 +29,10 @@
 const float kMockSpeedAccuracyMetersPerSecond = 1;
 const float kMockBearingAccuracyDegrees = 90;
 const int64_t kMockTimestamp = 1519930775453L;
+const float kGpsL1FreqHz = 1575.42 * 1e6;
+const float kGpsL5FreqHz = 1176.45 * 1e6;
+const float kGloG1FreqHz = 1602.0 * 1e6;
+const float kIrnssL5FreqHz = 1176.45 * 1e6;
 
 }  // namespace common
 }  // namespace gnss
diff --git a/gnss/common/utils/default/include/Utils.h b/gnss/common/utils/default/include/Utils.h
index 771d39d..43772ce 100644
--- a/gnss/common/utils/default/include/Utils.h
+++ b/gnss/common/utils/default/include/Utils.h
@@ -44,7 +44,8 @@
     static V1_0::IGnssCallback::GnssSvInfo getMockSvInfoV1_0(int16_t svid,
                                                              V1_0::GnssConstellationType type,
                                                              float cN0DbHz, float elevationDegrees,
-                                                             float azimuthDegrees);
+                                                             float azimuthDegrees,
+                                                             float carrierFrequencyHz);
     static hidl_vec<V2_1::IGnssAntennaInfoCallback::GnssAntennaInfo> getMockAntennaInfos();
 };
 
diff --git a/gnss/common/utils/default/include/v2_1/GnssTemplate.h b/gnss/common/utils/default/include/v2_1/GnssTemplate.h
index a1d6981..131af24 100644
--- a/gnss/common/utils/default/include/v2_1/GnssTemplate.h
+++ b/gnss/common/utils/default/include/v2_1/GnssTemplate.h
@@ -113,6 +113,7 @@
     void reportLocation(const V2_0::GnssLocation&) const;
     void reportLocation(const V1_0::GnssLocation&) const;
     void reportSvStatus(const hidl_vec<V2_1::IGnssCallback::GnssSvInfo>&) const;
+    void reportGnssStatusValue(const V1_0::IGnssCallback::GnssStatusValue) const;
 
     Return<void> help(const hidl_handle& fd);
     Return<void> setLocation(const hidl_handle& fd, const hidl_vec<hidl_string>& options);
@@ -215,6 +216,7 @@
     }
 
     mIsActive = true;
+    this->reportGnssStatusValue(V1_0::IGnssCallback::GnssStatusValue::SESSION_BEGIN);
     mThread = std::thread([this]() {
         while (mIsActive == true) {
             auto svStatus = filterBlocklistedSatellitesV2_1(Utils::getMockSvInfoListV2_1());
@@ -266,6 +268,7 @@
 Return<bool> GnssTemplate<T_IGnss>::stop() {
     ALOGD("stop");
     mIsActive = false;
+    this->reportGnssStatusValue(V1_0::IGnssCallback::GnssStatusValue::SESSION_END);
     if (mThread.joinable()) {
         mThread.join();
     }
@@ -606,6 +609,20 @@
 }
 
 template <class T_IGnss>
+void GnssTemplate<T_IGnss>::reportGnssStatusValue(
+        const V1_0::IGnssCallback::GnssStatusValue gnssStatusValue) const {
+    std::unique_lock<std::mutex> lock(mMutex);
+    if (sGnssCallback_2_1 == nullptr) {
+        ALOGE("%s: sGnssCallback v2.1 is null.", __func__);
+        return;
+    }
+    auto ret = sGnssCallback_2_1->gnssStatusCb(gnssStatusValue);
+    if (!ret.isOk()) {
+        ALOGE("%s: Unable to invoke callback", __func__);
+    }
+}
+
+template <class T_IGnss>
 void GnssTemplate<T_IGnss>::reportSvStatus(
         const hidl_vec<V2_1::IGnssCallback::GnssSvInfo>& svInfoList) const {
     std::unique_lock<std::mutex> lock(mMutex);