diff --git a/gnss/2.1/Android.bp b/gnss/2.1/Android.bp
index 2122399..7efc4a6 100644
--- a/gnss/2.1/Android.bp
+++ b/gnss/2.1/Android.bp
@@ -9,8 +9,6 @@
     srcs: [
         "types.hal",
         "IGnss.hal",
-        "IGnssAntennaInfo.hal",
-        "IGnssAntennaInfoCallback.hal",
         "IGnssCallback.hal",
         "IGnssMeasurement.hal",
         "IGnssMeasurementCallback.hal",
diff --git a/gnss/2.1/IGnss.hal b/gnss/2.1/IGnss.hal
index e4da507..ce37647 100644
--- a/gnss/2.1/IGnss.hal
+++ b/gnss/2.1/IGnss.hal
@@ -18,10 +18,10 @@
 
 import android.hardware.gnss.measurement_corrections@1.1::IMeasurementCorrections;
 import @2.0::IGnss;
+
 import IGnssCallback;
 import IGnssMeasurement;
 import IGnssConfiguration;
-import IGnssAntennaInfo;
 
 /**
  * Represents the standard GNSS (Global Navigation Satellite System) interface.
@@ -72,15 +72,5 @@
      *
      * @return measurementCorrectionsIface Handle to the IMeasurementCorrections interface.
      */
-    getExtensionMeasurementCorrections_1_1()
-        generates (IMeasurementCorrections measurementCorrectionsIface);
-
-    /**
-     * This method returns the IGnssAntennaInfo interface.
-     *
-     * This method must return non-null.
-     *
-     * @return gnssAntennaInfoIface Handle to the IGnssAntennaInfo interface.
-     */
-    getExtensionGnssAntennaInfo() generates (IGnssAntennaInfo gnssAntennaInfoIface);
-};
+     getExtensionMeasurementCorrections_1_1() generates (IMeasurementCorrections measurementCorrectionsIface);
+};
\ No newline at end of file
diff --git a/gnss/2.1/IGnssAntennaInfo.hal b/gnss/2.1/IGnssAntennaInfo.hal
deleted file mode 100644
index f77d874..0000000
--- a/gnss/2.1/IGnssAntennaInfo.hal
+++ /dev/null
@@ -1,46 +0,0 @@
-/*
- * Copyright (C) 2020 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.hardware.gnss@2.1;
-
-import IGnssAntennaInfoCallback;
-
-/**
- * Extended interface for GNSS antenna information support.
- */
-interface IGnssAntennaInfo {
-    enum GnssAntennaInfoStatus : int32_t {
-        SUCCESS = 0,
-        ERROR_ALREADY_INIT = -100,
-        ERROR_GENERIC = -101,
-    };
-
-    /**
-     * Registers the callback routines with the HAL.
-     *
-     * @param callback Handle to the GnssAntennaInfo callback interface.
-     */
-    setCallback(IGnssAntennaInfoCallback callback) generates (GnssAntennaInfoStatus initRet);
-
-    /**
-     * Stops updates from the HAL, and unregisters the callback routines.
-     * After a call to close(), the previously registered callbacks must be
-     * considered invalid by the HAL.
-     * If close() is invoked without a previous setCallback, this function must perform
-     * no work.
-     */
-    close();
-};
diff --git a/gnss/2.1/IGnssAntennaInfoCallback.hal b/gnss/2.1/IGnssAntennaInfoCallback.hal
deleted file mode 100644
index 883111e..0000000
--- a/gnss/2.1/IGnssAntennaInfoCallback.hal
+++ /dev/null
@@ -1,136 +0,0 @@
-/*
- * Copyright (C) 2020 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.hardware.gnss@2.1;
-
-/**
- * The callback interface to report GNSS antenna information from the HAL.
- */
-interface IGnssAntennaInfoCallback {
-    /**
-     * A row of doubles. This is used to represent a row in a 2D array, which are used to
-     * characterize the phase center variation corrections and signal gain corrections.
-     */
-    struct Row {
-        vec<double> row;
-    };
-
-    /**
-     * A point in 3D space, with associated uncertainty.
-     */
-    struct Coord {
-        double x;
-
-        double xUncertainty;
-
-        double y;
-
-        double yUncertainty;
-
-        double z;
-
-        double zUncertainty;
-    };
-
-    struct GnssAntennaInfo {
-        /**
-         * The carrier frequency in MHz.
-         */
-        double carrierFrequencyMHz;
-
-        /**
-         * Phase center offset (PCO) with associated 1-sigma uncertainty. PCO is defined with
-         * respect to the origin of the Android sensor coordinate system, e.g., center of primary
-         * screen for mobiles - see sensor or form factor documents for details.
-         */
-        Coord phaseCenterOffsetCoordinateMillimeters;
-
-        /**
-         * 2D vectors representing the phase center variation (PCV) corrections, in
-         * millimeters, at regularly spaced azimuthal angle (theta) and zenith angle
-         * (phi). The PCV correction is added to the phase measurement to obtain the
-         * corrected value.
-         *
-         * The azimuthal angle, theta, is defined with respect to the X axis of the
-         * Android sensor coordinate system, increasing toward the Y axis. The zenith
-         * angle, phi, is defined with respect to the Z axis of the Android Sensor
-         * coordinate system, increasing toward the X-Y plane.
-         *
-         * Each row vector (outer vectors) represents a fixed theta. The first row
-         * corresponds to a theta angle of 0 degrees. The last row corresponds to a
-         * theta angle of (360 - deltaTheta) degrees, where deltaTheta is the regular
-         * spacing between azimuthal angles, i.e., deltaTheta = 360 / (number of rows).
-         *
-         * The columns (inner vectors) represent fixed zenith angles, beginning at 0
-         * degrees and ending at 180 degrees. They are separated by deltaPhi, the regular
-         * spacing between zenith angles, i.e., deltaPhi = 180 / (number of columns - 1).
-         *
-         * This field is optional, i.e., an empty vector.
-         */
-        vec<Row> phaseCenterVariationCorrectionMillimeters;
-
-        /**
-         * 2D vectors of 1-sigma uncertainty in millimeters associated with the PCV
-         * correction values.
-         *
-         * This field is optional, i.e., an empty vector.
-         */
-        vec<Row> phaseCenterVariationCorrectionUncertaintyMillimeters;
-
-        /**
-         * 2D vectors representing the signal gain corrections at regularly spaced
-         * azimuthal angle (theta) and zenith angle (phi). The values are calculated or
-         * measured at the antenna feed point without considering the radio and receiver
-         * noise figure and path loss contribution, in dBi, i.e., decibel over isotropic
-         * antenna with the same total power. The signal gain correction is added the
-         * signal gain measurement to obtain the corrected value.
-         *
-         * The azimuthal angle, theta, is defined with respect to the X axis of the
-         * Android sensor coordinate system, increasing toward the Y axis. The zenith
-         * angle, phi, is defined with respect to the Z axis of the Android Sensor
-         * coordinate system, increasing toward the X-Y plane.
-         *
-         * Each row vector (outer vectors) represents a fixed theta. The first row
-         * corresponds to a theta angle of 0 degrees. The last row corresponds to a
-         * theta angle of (360 - deltaTheta) degrees, where deltaTheta is the regular
-         * spacing between azimuthal angles, i.e., deltaTheta = 360 / (number of rows).
-         *
-         * The columns (inner vectors) represent fixed zenith angles, beginning at 0
-         * degrees and ending at 180 degrees. They are separated by deltaPhi, the regular
-         * spacing between zenith angles, i.e., deltaPhi = 180 / (number of columns - 1).
-         *
-         * This field is optional, i.e., an empty vector.
-         */
-        vec<Row> signalGainCorrectionDbi;
-
-        /**
-         * 2D vectors of 1-sigma uncertainty in dBi associated with the signal
-         * gain correction values.
-         *
-         * This field is optional, i.e., an empty vector.
-         */
-        vec<Row> signalGainCorrectionUncertaintyDbi;
-    };
-
-    /**
-     * Called when on connection, and on known-change to these values, such as upon a known
-     * GNSS RF antenna tuning change, or a foldable device state change.
-     *
-     * This is optional. It can never be called if the GNSS antenna information is not
-     * available.
-     */
-    gnssAntennaInfoCb(vec<GnssAntennaInfo> gnssAntennaInfos);
-};
diff --git a/gnss/2.1/IGnssCallback.hal b/gnss/2.1/IGnssCallback.hal
index f7b7477..da70742 100644
--- a/gnss/2.1/IGnssCallback.hal
+++ b/gnss/2.1/IGnssCallback.hal
@@ -24,20 +24,8 @@
  * the interfaces and passes a handle to the HAL.
  */
 interface IGnssCallback extends @2.0::IGnssCallback {
-    /**
-     * Flags for the gnssSetCapabilities callback.
-     */
-    @export(name = "", value_prefix = "GPS_CAPABILITY_")
-    enum Capabilities : @2.0::IGnssCallback.Capabilities {
-        /**
-         * GNSS supports measurement corrections
-         */
-        ANTENNA_INFO = 1 << 11,
-    };
 
-    /**
-     * Extends a GnssSvInfo, adding a basebandCN0DbHz.
-     */
+    /** Extends a GnssSvInfo, adding a basebandCN0DbHz. */
     struct GnssSvInfo {
         /**
          * GNSS satellite information for a single satellite and frequency.
diff --git a/gnss/2.1/IGnssConfiguration.hal b/gnss/2.1/IGnssConfiguration.hal
index 550f325..8360ba9 100644
--- a/gnss/2.1/IGnssConfiguration.hal
+++ b/gnss/2.1/IGnssConfiguration.hal
@@ -65,4 +65,4 @@
      * @return success Whether the HAL accepts and abides by the provided blacklist.
      */
     setBlacklist_2_1(vec<BlacklistedSource> blacklist) generates (bool success);
-};
+};
\ No newline at end of file
diff --git a/gnss/2.1/IGnssMeasurement.hal b/gnss/2.1/IGnssMeasurement.hal
index 49ba7eb..d2c76e6 100644
--- a/gnss/2.1/IGnssMeasurement.hal
+++ b/gnss/2.1/IGnssMeasurement.hal
@@ -25,6 +25,7 @@
  * Extended interface for GNSS Measurements support.
  */
 interface IGnssMeasurement extends @2.0::IGnssMeasurement {
+
     /**
      * Initializes the interface and registers the callback routines with the HAL. After a
      * successful call to 'setCallback_2_1' the HAL must begin to provide updates at an average
@@ -46,5 +47,5 @@
      *     error code.
      */
     setCallback_2_1(IGnssMeasurementCallback callback, bool enableFullTracking)
-        generates (GnssMeasurementStatus initRet);
+         generates (GnssMeasurementStatus initRet);
 };
diff --git a/gnss/2.1/IGnssMeasurementCallback.hal b/gnss/2.1/IGnssMeasurementCallback.hal
index 1aee272..0385abd 100644
--- a/gnss/2.1/IGnssMeasurementCallback.hal
+++ b/gnss/2.1/IGnssMeasurementCallback.hal
@@ -21,56 +21,36 @@
 import @2.0::ElapsedRealtime;
 import GnssSignalType;
 
-/**
- * The callback interface to report measurements from the HAL.
- */
+/** The callback interface to report measurements from the HAL. */
 interface IGnssMeasurementCallback extends @2.0::IGnssMeasurementCallback {
+
     /**
      * Flags to indicate what fields in GnssMeasurement are valid.
      */
     enum GnssMeasurementFlags : uint32_t {
-        /**
-         * A valid 'snr' is stored in the data structure.
-         */
-        HAS_SNR = 1 << 0,
-        /**
-         * A valid 'carrier frequency' is stored in the data structure.
-         */
-        HAS_CARRIER_FREQUENCY = 1 << 9,
-        /**
-         * A valid 'carrier cycles' is stored in the data structure.
-         */
-        HAS_CARRIER_CYCLES = 1 << 10,
-        /**
-         * A valid 'carrier phase' is stored in the data structure.
-         */
-        HAS_CARRIER_PHASE = 1 << 11,
-        /**
-         * A valid 'carrier phase uncertainty' is stored in the data structure.
-         */
-        HAS_CARRIER_PHASE_UNCERTAINTY = 1 << 12,
-        /**
-         * A valid automatic gain control is stored in the data structure.
-         */
-        HAS_AUTOMATIC_GAIN_CONTROL = 1 << 13,
-        /**
-         * A valid receiver inter-signal bias is stored in the data structure.
-         */
-        HAS_RECEIVER_ISB = 1 << 16,
-        /**
-         * A valid receiver inter-signal bias uncertainty is stored in the data structure.
-         */
-        HAS_RECEIVER_ISB_UNCERTAINTY = 1 << 17,
-        /**
-         * A valid satellite inter-signal bias is stored in the data structure.
-         */
-        HAS_SATELLITE_ISB = 1 << 18,
-        /**
-         * A valid satellite inter-signal bias uncertainty is stored in the data structure.
-         */
-        HAS_SATELLITE_ISB_UNCERTAINTY = 1 << 19,
+        /** A valid 'snr' is stored in the data structure. */
+        HAS_SNR                           = 1 << 0,
+        /** A valid 'carrier frequency' is stored in the data structure. */
+        HAS_CARRIER_FREQUENCY             = 1 << 9,
+        /** A valid 'carrier cycles' is stored in the data structure. */
+        HAS_CARRIER_CYCLES                = 1 << 10,
+        /** A valid 'carrier phase' is stored in the data structure. */
+        HAS_CARRIER_PHASE                 = 1 << 11,
+        /** A valid 'carrier phase uncertainty' is stored in the data structure. */
+        HAS_CARRIER_PHASE_UNCERTAINTY     = 1 << 12,
+        /** A valid automatic gain control is stored in the data structure. */
+        HAS_AUTOMATIC_GAIN_CONTROL        = 1 << 13,
+        /** A valid receiver inter-signal bias is stored in the data structure. */
+        HAS_RECEIVER_ISB                  = 1 << 16,
+        /** A valid receiver inter-signal bias uncertainty is stored in the data structure. */
+        HAS_RECEIVER_ISB_UNCERTAINTY      = 1 << 17,
+        /** A valid satellite inter-signal bias is stored in the data structure. */
+        HAS_SATELLITE_ISB                 = 1 << 18,
+        /** A valid satellite inter-signal bias uncertainty is stored in the data structure. */
+        HAS_SATELLITE_ISB_UNCERTAINTY     = 1 << 19
     };
 
+
     /**
      * Extends a GNSS Measurement, adding basebandCN0DbHz, GnssMeasurementFlags,
      * receiverInterSignalBiasNs, receiverInterSignalBiasUncertaintyNs, satelliteInterSignalBiasNs
@@ -180,14 +160,10 @@
      * Complete set of GNSS Measurement data, same as 2.0 with additional fields in measurements.
      */
     struct GnssData {
-        /**
-         * The full set of satellite measurement observations.
-         */
+        /** The full set of satellite measurement observations. */
         vec<GnssMeasurement> measurements;
 
-        /**
-         * The GNSS clock time reading.
-         */
+        /** The GNSS clock time reading. */
         GnssClock clock;
 
         /**
diff --git a/gnss/2.1/default/Android.bp b/gnss/2.1/default/Android.bp
index c4dc8fd..1f1078e 100644
--- a/gnss/2.1/default/Android.bp
+++ b/gnss/2.1/default/Android.bp
@@ -22,7 +22,6 @@
     vintf_fragments: ["android.hardware.gnss@2.1-service.xml"],
     srcs: [
         "Gnss.cpp",
-        "GnssAntennaInfo.cpp",
         "GnssDebug.cpp",
         "GnssMeasurement.cpp",
         "GnssMeasurementCorrections.cpp",
diff --git a/gnss/2.1/default/Gnss.cpp b/gnss/2.1/default/Gnss.cpp
index c1af103..679eb35 100644
--- a/gnss/2.1/default/Gnss.cpp
+++ b/gnss/2.1/default/Gnss.cpp
@@ -17,7 +17,6 @@
 #define LOG_TAG "Gnss"
 
 #include "Gnss.h"
-#include "GnssAntennaInfo.h"
 #include "GnssDebug.h"
 #include "GnssMeasurement.h"
 #include "GnssMeasurementCorrections.h"
@@ -335,10 +334,9 @@
 
     sGnssCallback_2_1 = callback;
 
-    using Capabilities = V2_1::IGnssCallback::Capabilities;
+    using Capabilities = V2_0::IGnssCallback::Capabilities;
     const auto capabilities = Capabilities::MEASUREMENTS | Capabilities::MEASUREMENT_CORRECTIONS |
-                              Capabilities::LOW_POWER_MODE | Capabilities::SATELLITE_BLACKLIST |
-                              Capabilities::ANTENNA_INFO;
+                              Capabilities::LOW_POWER_MODE | Capabilities::SATELLITE_BLACKLIST;
     auto ret = sGnssCallback_2_1->gnssSetCapabilitiesCb_2_0(capabilities);
     if (!ret.isOk()) {
         ALOGE("%s: Unable to invoke callback", __func__);
@@ -376,11 +374,6 @@
     return new GnssMeasurementCorrections();
 }
 
-Return<sp<V2_1::IGnssAntennaInfo>> Gnss::getExtensionGnssAntennaInfo() {
-    ALOGD("Gnss::getExtensionGnssAntennaInfo");
-    return new GnssAntennaInfo();
-}
-
 void Gnss::reportSvStatus(const hidl_vec<GnssSvInfo>& svInfoList) const {
     std::unique_lock<std::mutex> lock(mMutex);
     // TODO(skz): update this to call 2_0 callback if non-null
diff --git a/gnss/2.1/default/Gnss.h b/gnss/2.1/default/Gnss.h
index bd5e6e8..c47206a 100644
--- a/gnss/2.1/default/Gnss.h
+++ b/gnss/2.1/default/Gnss.h
@@ -22,7 +22,6 @@
 #include <atomic>
 #include <mutex>
 #include <thread>
-#include "GnssAntennaInfo.h"
 #include "GnssConfiguration.h"
 
 namespace android {
@@ -92,7 +91,6 @@
     Return<sp<V2_1::IGnssConfiguration>> getExtensionGnssConfiguration_2_1() override;
     Return<sp<measurement_corrections::V1_1::IMeasurementCorrections>>
     getExtensionMeasurementCorrections_1_1() override;
-    Return<sp<V2_1::IGnssAntennaInfo>> getExtensionGnssAntennaInfo() override;
 
   private:
     void reportLocation(const V2_0::GnssLocation&) const;
diff --git a/gnss/2.1/default/GnssAntennaInfo.cpp b/gnss/2.1/default/GnssAntennaInfo.cpp
deleted file mode 100644
index d32a0af..0000000
--- a/gnss/2.1/default/GnssAntennaInfo.cpp
+++ /dev/null
@@ -1,109 +0,0 @@
-/*
- * Copyright (C) 2020 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define LOG_TAG "GnssAntennaInfo"
-
-#include "GnssAntennaInfo.h"
-#include "Utils.h"
-
-#include <log/log.h>
-
-using ::android::hardware::gnss::common::Utils;
-
-namespace android {
-namespace hardware {
-namespace gnss {
-namespace V2_1 {
-namespace implementation {
-
-sp<IGnssAntennaInfoCallback> GnssAntennaInfo::sCallback = nullptr;
-
-GnssAntennaInfo::GnssAntennaInfo() : mMinIntervalMillis(1000) {}
-
-GnssAntennaInfo::~GnssAntennaInfo() {
-    stop();
-}
-
-// Methods from ::android::hardware::gnss::V2_1::IGnssAntennaInfo follow.
-Return<GnssAntennaInfo::GnssAntennaInfoStatus> GnssAntennaInfo::setCallback(
-        const sp<IGnssAntennaInfoCallback>& callback) {
-    ALOGD("setCallback");
-    std::unique_lock<std::mutex> lock(mMutex);
-    sCallback = callback;
-
-    if (mIsActive) {
-        ALOGW("GnssAntennaInfo callback already set. Resetting the callback...");
-        stop();
-    }
-    start();
-
-    return GnssAntennaInfoStatus::SUCCESS;
-}
-
-Return<void> GnssAntennaInfo::close() {
-    ALOGD("close");
-    std::unique_lock<std::mutex> lock(mMutex);
-    stop();
-    sCallback = nullptr;
-    return Void();
-}
-
-// Private methods
-void GnssAntennaInfo::start() {
-    ALOGD("start");
-    mIsActive = true;
-    mThread = std::thread([this]() {
-        while (mIsActive == true) {
-            if (sCallback != nullptr) {
-                auto antennaInfos = Utils::getMockAntennaInfos();
-                this->reportAntennaInfo(antennaInfos);
-            }
-
-            /** For mock implementation this is good. On real device, we should only report
-                antennaInfo at start and when there is a configuration change. **/
-            std::this_thread::sleep_for(std::chrono::milliseconds(mMinIntervalMillis));
-        }
-    });
-}
-
-void GnssAntennaInfo::stop() {
-    ALOGD("stop");
-    mIsActive = false;
-    if (mThread.joinable()) {
-        mThread.join();
-    }
-}
-
-void GnssAntennaInfo::reportAntennaInfo(
-        const hidl_vec<IGnssAntennaInfoCallback::GnssAntennaInfo>& antennaInfo) const {
-    std::unique_lock<std::mutex> lock(mMutex);
-
-    if (sCallback == nullptr) {
-        ALOGE("%s: No non-null callback", __func__);
-        return;
-    }
-
-    auto ret = sCallback->gnssAntennaInfoCb(antennaInfo);
-    if (!ret.isOk()) {
-        ALOGE("%s: Unable to invoke callback", __func__);
-    }
-}
-
-}  // namespace implementation
-}  // namespace V2_1
-}  // namespace gnss
-}  // namespace hardware
-}  // namespace android
\ No newline at end of file
diff --git a/gnss/2.1/default/GnssAntennaInfo.h b/gnss/2.1/default/GnssAntennaInfo.h
deleted file mode 100644
index f4bfd24..0000000
--- a/gnss/2.1/default/GnssAntennaInfo.h
+++ /dev/null
@@ -1,63 +0,0 @@
-/*
- * Copyright (C) 2020 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef ANDROID_HARDWARE_GNSS_V2_1_GNSSANTENNAINFO_H
-#define ANDROID_HARDWARE_GNSS_V2_1_GNSSANTENNAINFO_H
-
-#include <android/hardware/gnss/2.1/IGnssAntennaInfo.h>
-
-#include <mutex>
-#include <thread>
-
-namespace android {
-namespace hardware {
-namespace gnss {
-namespace V2_1 {
-namespace implementation {
-
-using ::android::sp;
-using ::android::hardware::Return;
-using ::android::hardware::Void;
-
-struct GnssAntennaInfo : public IGnssAntennaInfo {
-    GnssAntennaInfo();
-    ~GnssAntennaInfo();
-
-    // Methods from ::android::hardware::gnss::V2_1::IGnssAntennaInfo follow.
-    Return<GnssAntennaInfoStatus> setCallback(
-            const sp<IGnssAntennaInfoCallback>& callback) override;
-    Return<void> close() override;
-
-  private:
-    void start();
-    void stop();
-    void reportAntennaInfo(
-            const hidl_vec<IGnssAntennaInfoCallback::GnssAntennaInfo>& antennaInfo) const;
-
-    static sp<IGnssAntennaInfoCallback> sCallback;
-    std::atomic<long> mMinIntervalMillis;
-    std::atomic<bool> mIsActive;
-    std::thread mThread;
-    mutable std::mutex mMutex;
-};
-
-}  // namespace implementation
-}  // namespace V2_1
-}  // namespace gnss
-}  // namespace hardware
-}  // namespace android
-
-#endif  // ANDROID_HARDWARE_GNSS_V2_1_GNSSCONFIGURATION_H
\ No newline at end of file
diff --git a/gnss/2.1/vts/functional/gnss_hal_test.cpp b/gnss/2.1/vts/functional/gnss_hal_test.cpp
index 83c4c3c..93f89f5 100644
--- a/gnss/2.1/vts/functional/gnss_hal_test.cpp
+++ b/gnss/2.1/vts/functional/gnss_hal_test.cpp
@@ -262,11 +262,4 @@
     ALOGI("GnssMeasurementCorrectionsCallback capabilities received %d", capabilities);
     capabilities_cbq_.store(capabilities);
     return Void();
-}
-
-Return<void> GnssHalTest::GnssAntennaInfoCallback::gnssAntennaInfoCb(
-        const hidl_vec<IGnssAntennaInfoCallback::GnssAntennaInfo>& gnssAntennaInfos) {
-    ALOGD("GnssAntennaInfo v2.1 received. Size = %d", (int)gnssAntennaInfos.size());
-    antenna_info_cbq_.store(gnssAntennaInfos);
-    return Void();
 }
\ No newline at end of file
diff --git a/gnss/2.1/vts/functional/gnss_hal_test.h b/gnss/2.1/vts/functional/gnss_hal_test.h
index 3472edb..b99cf23 100644
--- a/gnss/2.1/vts/functional/gnss_hal_test.h
+++ b/gnss/2.1/vts/functional/gnss_hal_test.h
@@ -31,8 +31,6 @@
 using android::hardware::gnss::V1_0::GnssLocationFlags;
 using android::hardware::gnss::V2_0::GnssConstellationType;
 using android::hardware::gnss::V2_1::IGnss;
-using android::hardware::gnss::V2_1::IGnssAntennaInfo;
-using android::hardware::gnss::V2_1::IGnssAntennaInfoCallback;
 
 using GnssLocation_1_0 = android::hardware::gnss::V1_0::GnssLocation;
 using GnssLocation_2_0 = android::hardware::gnss::V2_0::GnssLocation;
@@ -154,20 +152,6 @@
         Return<void> setCapabilitiesCb(uint32_t capabilities) override;
     };
 
-    /* Callback class for GnssAntennaInfo. */
-    class GnssAntennaInfoCallback : public IGnssAntennaInfoCallback {
-      public:
-        GnssCallbackEventQueue<hidl_vec<IGnssAntennaInfoCallback::GnssAntennaInfo>>
-                antenna_info_cbq_;
-
-        GnssAntennaInfoCallback() : antenna_info_cbq_("info"){};
-        virtual ~GnssAntennaInfoCallback() = default;
-
-        // Methods from V2_1::GnssAntennaInfoCallback follow.
-        Return<void> gnssAntennaInfoCb(
-                const hidl_vec<IGnssAntennaInfoCallback::GnssAntennaInfo>& gnssAntennaInfos);
-    };
-
     /*
      * SetUpGnssCallback:
      *   Set GnssCallback and verify the result.
diff --git a/gnss/2.1/vts/functional/gnss_hal_test_cases.cpp b/gnss/2.1/vts/functional/gnss_hal_test_cases.cpp
index 7b054c0..9ac9436 100644
--- a/gnss/2.1/vts/functional/gnss_hal_test_cases.cpp
+++ b/gnss/2.1/vts/functional/gnss_hal_test_cases.cpp
@@ -139,7 +139,7 @@
             std::string codeType = lastMeasurement.clock.referenceSignalTypeForIsb.codeType;
 
             ASSERT_TRUE(referenceConstellation >= GnssConstellationType::UNKNOWN &&
-                        referenceConstellation <= GnssConstellationType::IRNSS);
+                        referenceConstellation >= GnssConstellationType::IRNSS);
             ASSERT_TRUE(carrierFrequencyHz > 0);
             ASSERT_TRUE(codeType != "");
 
@@ -154,85 +154,6 @@
 }
 
 /*
- * TestGnssAntennaInfo:
- * Sets a GnssAntennaInfoCallback, waits for report, and verifies
- * 1. phaseCenterOffsetCoordinateMillimeters is valid
- * 2. phaseCenterOffsetCoordinateUncertaintyMillimeters is valid.
- * PhaseCenterVariationCorrections and SignalGainCorrections are optional.
- */
-TEST_P(GnssHalTest, TestGnssAntennaInfo) {
-    const int kAntennaInfoTimeoutSeconds = 2;
-
-    auto gnssAntennaInfo = gnss_hal_->getExtensionGnssAntennaInfo();
-    ASSERT_TRUE(gnssAntennaInfo.isOk());
-
-    // Skip test if GnssAntennaInfo v2.1 is not supported
-    sp<IGnssAntennaInfo> iGnssAntennaInfo = gnssAntennaInfo;
-    if (!(gnss_cb_->last_capabilities_ & IGnssCallback_2_1::Capabilities::ANTENNA_INFO) ||
-        iGnssAntennaInfo == nullptr) {
-        ALOGD("GnssAntennaInfo v2.1 is not supported.");
-        return;
-    }
-
-    sp<GnssAntennaInfoCallback> callback = new GnssAntennaInfoCallback();
-    auto result = iGnssAntennaInfo->setCallback(callback);
-    ASSERT_TRUE(result.isOk());
-    EXPECT_EQ(result, IGnssAntennaInfo::GnssAntennaInfoStatus::SUCCESS);
-
-    hidl_vec<IGnssAntennaInfoCallback::GnssAntennaInfo> antennaInfos;
-    ASSERT_TRUE(callback->antenna_info_cbq_.retrieve(antennaInfos, kAntennaInfoTimeoutSeconds));
-    EXPECT_EQ(callback->antenna_info_cbq_.calledCount(), 1);
-    ASSERT_TRUE(antennaInfos.size() > 0);
-
-    for (auto antennaInfo : antennaInfos) {
-        // Remaining fields are optional
-        if (antennaInfo.phaseCenterVariationCorrectionMillimeters != NULL) {
-            int numRows = antennaInfo.phaseCenterVariationCorrectionMillimeters.size();
-            int numColumns = antennaInfo.phaseCenterVariationCorrectionMillimeters[0].row.size();
-            // Must have at least 1 row and 2 columns
-            ASSERT_TRUE(numRows >= 1 && numColumns >= 2);
-
-            // Corrections and uncertainties must have same dimensions
-            ASSERT_TRUE(antennaInfo.phaseCenterVariationCorrectionMillimeters.size() ==
-                        antennaInfo.phaseCenterVariationCorrectionUncertaintyMillimeters.size());
-            ASSERT_TRUE(
-                    antennaInfo.phaseCenterVariationCorrectionMillimeters[0].row.size() ==
-                    antennaInfo.phaseCenterVariationCorrectionUncertaintyMillimeters[0].row.size());
-
-            // Must be rectangular
-            for (auto row : antennaInfo.phaseCenterVariationCorrectionMillimeters) {
-                ASSERT_TRUE(row.row.size() == numColumns);
-            }
-            for (auto row : antennaInfo.phaseCenterVariationCorrectionUncertaintyMillimeters) {
-                ASSERT_TRUE(row.row.size() == numColumns);
-            }
-        }
-        if (antennaInfo.signalGainCorrectionDbi != NULL) {
-            int numRows = antennaInfo.signalGainCorrectionDbi.size();
-            int numColumns = antennaInfo.signalGainCorrectionUncertaintyDbi[0].row.size();
-            // Must have at least 1 row and 2 columns
-            ASSERT_TRUE(numRows >= 1 && numColumns >= 2);
-
-            // Corrections and uncertainties must have same dimensions
-            ASSERT_TRUE(antennaInfo.signalGainCorrectionDbi.size() ==
-                        antennaInfo.signalGainCorrectionUncertaintyDbi.size());
-            ASSERT_TRUE(antennaInfo.signalGainCorrectionDbi[0].row.size() ==
-                        antennaInfo.signalGainCorrectionUncertaintyDbi[0].row.size());
-
-            // Must be rectangular
-            for (auto row : antennaInfo.signalGainCorrectionDbi) {
-                ASSERT_TRUE(row.row.size() == numColumns);
-            }
-            for (auto row : antennaInfo.signalGainCorrectionUncertaintyDbi) {
-                ASSERT_TRUE(row.row.size() == numColumns);
-            }
-        }
-    }
-
-    iGnssAntennaInfo->close();
-}
-
-/*
  * TestGnssSvInfoFields:
  * Gets 1 location and a GnssSvInfo, and verifies
  * 1. basebandCN0DbHz is valid.