diff --git a/automotive/vehicle/2.0/default/impl/vhal_v2_0/DefaultConfig.h b/automotive/vehicle/2.0/default/impl/vhal_v2_0/DefaultConfig.h
index f09d75b..8ff4924 100644
--- a/automotive/vehicle/2.0/default/impl/vhal_v2_0/DefaultConfig.h
+++ b/automotive/vehicle/2.0/default/impl/vhal_v2_0/DefaultConfig.h
@@ -1025,7 +1025,7 @@
                 .config =
                         {
                                 .prop = toInt(VehicleProperty::EPOCH_TIME),
-                                .access = VehiclePropertyAccess::READ_WRITE,
+                                .access = VehiclePropertyAccess::WRITE,
                                 .changeMode = VehiclePropertyChangeMode::ON_CHANGE,
                         },
         },
diff --git a/automotive/vehicle/2.0/types.hal b/automotive/vehicle/2.0/types.hal
index 6bfda32..7c8e1f5 100644
--- a/automotive/vehicle/2.0/types.hal
+++ b/automotive/vehicle/2.0/types.hal
@@ -487,8 +487,11 @@
      *  int64Values[3] = rear right ticks
      *  int64Values[4] = rear left ticks
      *
-     * configArray is used to indicate the micrometers-per-wheel-tick value and
-     * which wheels are supported.  configArray is set as follows:
+     * configArray is used to indicate the micrometers-per-wheel-tick values and
+     * which wheels are supported. Each micrometers-per-wheel-tick value is static (i.e. will not
+     * update based on wheel's status) and a best approximation. For example, if a vehicle has
+     * multiple rim/tire size options, the micrometers-per-wheel-tick values are set to those for
+     * the typically expected rim/tire size. configArray is set as follows:
      *
      *  configArray[0], bits [0:3] = supported wheels.  Uses enum Wheel.
      *  configArray[1] = micrometers per front left wheel tick
@@ -1433,17 +1436,29 @@
      * This value denotes the number of milliseconds seconds that have
      * elapsed since 1/1/1970 UTC.
      *
-     * Reading this value will give you the system’s time. This can be
-     * useful to synchronize other vehicle systems (dash clock etc).
+     * AAOS will write to this value to give VHAL the Android system's time,
+     * if the VHAL supports this property. This can be useful to synchronize
+     * other vehicle systems (dash clock etc) with Android's time.
      *
-     * Writing this value will update the ‘ExternalTimeSuggestion’
-     * value (if enabled). This value may be consumed by the “Time
-     * Detector Service”, if other sources do not have a higher
-     * priority. For information on how to adjust time source
-     * priorities see Time Detector Service documentation.
+     * AAOS writes to this property once during boot, and
+     * will thereafter write only when some time-source changes are propagated.
+     * AAOS will fill in VehiclePropValue.timestamp correctly.
+     * Note that AAOS will not send updates for natural elapse of time.
+     *     int64Values[0] = provided Unix time (in milliseconds)
+     *
+     * Note that the property may take >0 ms to get propagated through the stack
+     * and, having a timestamped property helps reduce any time drift. So,
+     * for all writes to the property, the timestamp can be used to negate this
+     * drift:
+     *     drift = currentTimeMillis - PropValue.timestamp
+     *     effectiveTime = PropValue.value.int64Values[0] + diff
+     *
+     * Aside, this property could have been better named ANDROID_EPOCH_TIME, but it
+     * continues to be called EPOCH_TIME for legacy reasons. We will try to fix
+     * this naming discrepancy when we migrate to AIDL.
      *
      * @change_mode VehiclePropertyChangeMode:ON_CHANGE
-     * @access VehiclePropertyAccess:READ_WRITE
+     * @access VehiclePropertyAccess:WRITE_ONLY
      * @unit VehicleUnit:MILLI_SECS
      */
     EPOCH_TIME = (
diff --git a/current.txt b/current.txt
index 59fbfa9..21ee123 100644
--- a/current.txt
+++ b/current.txt
@@ -898,6 +898,8 @@
 c8a57364f6ad20842be14f4db284df5304f7521ca8eac6bcc1fa6c5b466fb8a6 android.hardware.wifi.supplicant@1.4::ISupplicantStaNetwork
 2123482b69f3b531c88023aa2a007110e130efbf4ed68ac9ce0bc55d5e82bc8b android.hardware.wifi.supplicant@1.4::ISupplicantStaNetworkCallback
 0821f516e4d428bc15251969f7e19411c94d8f2ccbd99e1fc8168d8e49e38b0f android.hardware.wifi.supplicant@1.4::types
+4a087a308608d146b022ebc15633de989f5f4dfe1491a83fa41763290a82e40d android.hardware.automotive.vehicle@2.0::types
+70eb14415391f835fb218b43a1e25f5d6495f098f96fa2acaea70985e98e1ce8 android.hardware.automotive.vehicle@2.0::types
 
 # ABI preserving changes to HALs during Android T
 62ace52d9c3ff1f60f94118557a2aaf0b953513e59dcd34d5f94ae28d4c7e780 android.hardware.fastboot@1.0::IFastboot
diff --git a/radio/config/1.1/vts/functional/radio_config_hidl_hal_api.cpp b/radio/config/1.1/vts/functional/radio_config_hidl_hal_api.cpp
index 49c7aad..40069bf 100644
--- a/radio/config/1.1/vts/functional/radio_config_hidl_hal_api.cpp
+++ b/radio/config/1.1/vts/functional/radio_config_hidl_hal_api.cpp
@@ -58,7 +58,16 @@
 TEST_P(RadioConfigHidlTest, setModemsConfig_goodRequest) {
     serial = GetRandomSerialNumber();
     ModemsConfig* mConfig = new ModemsConfig();
-    mConfig->numOfLiveModems = 1;
+    if (isSsSsEnabled()) {
+        mConfig->numOfLiveModems = 1;
+    } else if (isDsDsEnabled()) {
+        mConfig->numOfLiveModems = 2;
+    } else if (isTsTsEnabled()) {
+        mConfig->numOfLiveModems = 3;
+    } else {
+        ALOGI("Skipping setModemsConfig_goodRequest, unsupported multisim number");
+        return;
+    }
     Return<void> res = radioConfig->setModemsConfig(serial, *mConfig);
     ASSERT_OK(res);
     EXPECT_EQ(std::cv_status::no_timeout, wait());