diff --git a/radio/aidl/compat/libradiocompat/Android.bp b/radio/aidl/compat/libradiocompat/Android.bp
index 487d91b..aa20fc3 100644
--- a/radio/aidl/compat/libradiocompat/Android.bp
+++ b/radio/aidl/compat/libradiocompat/Android.bp
@@ -40,6 +40,7 @@
         "android.hardware.radio.messaging-V1-ndk",
         "android.hardware.radio.modem-V1-ndk",
         "android.hardware.radio.network-V1-ndk",
+        "android.hardware.radio.sap-V1-ndk",
         "android.hardware.radio.sim-V1-ndk",
         "android.hardware.radio.voice-V1-ndk",
         "android.hardware.radio@1.0",
@@ -82,6 +83,9 @@
         "network/RadioResponse-network.cpp",
         "network/structs.cpp",
         "network/utils.cpp",
+        "sap/Sap.cpp",
+        "sap/SapCallback.cpp",
+        "sap/structs.cpp",
         "sim/RadioIndication-sim.cpp",
         "sim/RadioResponse-sim.cpp",
         "sim/RadioSim.cpp",
diff --git a/radio/aidl/compat/libradiocompat/commonStructs.cpp b/radio/aidl/compat/libradiocompat/commonStructs.cpp
index 6e4c873..d65ed1a 100644
--- a/radio/aidl/compat/libradiocompat/commonStructs.cpp
+++ b/radio/aidl/compat/libradiocompat/commonStructs.cpp
@@ -48,6 +48,10 @@
     return v;
 }
 
+uint8_t toHidl(int8_t v) {
+    return v;
+}
+
 aidl::RadioIndicationType toAidl(V1_0::RadioIndicationType type) {
     return aidl::RadioIndicationType(type);
 }
diff --git a/radio/aidl/compat/libradiocompat/commonStructs.h b/radio/aidl/compat/libradiocompat/commonStructs.h
index a4a4869..f43a599 100644
--- a/radio/aidl/compat/libradiocompat/commonStructs.h
+++ b/radio/aidl/compat/libradiocompat/commonStructs.h
@@ -28,6 +28,7 @@
 uint8_t toAidl(int8_t v);
 int8_t toAidl(uint8_t v);
 int32_t toAidl(uint32_t v);
+uint8_t toHidl(int8_t v);
 
 aidl::android::hardware::radio::RadioIndicationType toAidl(V1_0::RadioIndicationType type);
 aidl::android::hardware::radio::RadioResponseType toAidl(V1_0::RadioResponseType type);
diff --git a/radio/aidl/compat/libradiocompat/include/libradiocompat/Sap.h b/radio/aidl/compat/libradiocompat/include/libradiocompat/Sap.h
new file mode 100644
index 0000000..a293d11
--- /dev/null
+++ b/radio/aidl/compat/libradiocompat/include/libradiocompat/Sap.h
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2022 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.
+ */
+#pragma once
+
+#include "RadioCompatBase.h"
+#include "SapCallback.h"
+
+#include <aidl/android/hardware/radio/sap/BnSap.h>
+#include <android/hardware/radio/1.0/ISap.h>
+#include <android/hardware/radio/1.0/ISapCallback.h>
+
+namespace android::hardware::radio::compat {
+
+/**
+ * HAL translator from HIDL ISap to AIDL ISap
+ *
+ * This class wraps existing HIDL implementation (either a binder stub or real
+ * class implementing the HAL) and implements AIDL HAL. It's up to the caller to
+ * fetch source implementation and publish resulting HAL instance.
+ */
+class Sap : public aidl::android::hardware::radio::sap::BnSap {
+    const sp<radio::V1_0::ISap> mHal;
+
+    const sp<SapCallback> mSapCallback;
+
+    ::ndk::ScopedAStatus apduReq(int32_t serial,
+                                 aidl::android::hardware::radio::sap::SapApduType type,
+                                 const std::vector<uint8_t>& command) override;
+    ::ndk::ScopedAStatus connectReq(int32_t serial, int32_t maxMsgSize) override;
+    ::ndk::ScopedAStatus disconnectReq(int32_t serial) override;
+    ::ndk::ScopedAStatus powerReq(int32_t serial, bool state) override;
+    ::ndk::ScopedAStatus resetSimReq(int32_t serial) override;
+    ::ndk::ScopedAStatus setCallback(
+            const std::shared_ptr<::aidl::android::hardware::radio::sap::ISapCallback>& sapCallback)
+            override;
+    ::ndk::ScopedAStatus setTransferProtocolReq(
+            int32_t serial,
+            aidl::android::hardware::radio::sap::SapTransferProtocol transferProtocol) override;
+    ::ndk::ScopedAStatus transferAtrReq(int32_t serial) override;
+    ::ndk::ScopedAStatus transferCardReaderStatusReq(int32_t serial) override;
+
+  public:
+    /**
+     * Constructs AIDL ISap instance wrapping existing HIDL ISap instance.
+     *
+     * \param hidlHal existing HIDL ISap HAL instance
+     */
+    Sap(sp<V1_0::ISap> hidlHal);
+};
+
+}  // namespace android::hardware::radio::compat
diff --git a/radio/aidl/compat/libradiocompat/include/libradiocompat/SapCallback.h b/radio/aidl/compat/libradiocompat/include/libradiocompat/SapCallback.h
new file mode 100644
index 0000000..7e72106
--- /dev/null
+++ b/radio/aidl/compat/libradiocompat/include/libradiocompat/SapCallback.h
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2022 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.
+ */
+#pragma once
+
+#include "GuaranteedCallback.h"
+
+#include <aidl/android/hardware/radio/sap/ISapCallback.h>
+#include <android/hardware/radio/1.0/ISapCallback.h>
+
+namespace android::hardware::radio::compat {
+
+class SapCallback : public V1_0::ISapCallback {
+    GuaranteedCallback<aidl::android::hardware::radio::sap::ISapCallback,
+                       aidl::android::hardware::radio::sap::ISapCallbackDefault>
+            mCallback;
+
+    Return<void> apduResponse(int32_t serial, V1_0::SapResultCode resultCode,
+                              const ::android::hardware::hidl_vec<uint8_t>& apduRsp) override;
+    Return<void> connectResponse(int32_t serial, V1_0::SapConnectRsp sapConnectRsp,
+                                 int32_t maxMsgSize) override;
+    Return<void> disconnectIndication(int32_t serial,
+                                      V1_0::SapDisconnectType disconnectType) override;
+    Return<void> disconnectResponse(int32_t serial) override;
+    Return<void> errorResponse(int32_t serial) override;
+    Return<void> powerResponse(int32_t serial, V1_0::SapResultCode resultCode) override;
+    Return<void> resetSimResponse(int32_t serial, V1_0::SapResultCode resultCode) override;
+    Return<void> statusIndication(int32_t serial, V1_0::SapStatus status) override;
+    Return<void> transferAtrResponse(int32_t serial, V1_0::SapResultCode resultCode,
+                                     const ::android::hardware::hidl_vec<uint8_t>& atr) override;
+    Return<void> transferCardReaderStatusResponse(int32_t serial, V1_0::SapResultCode resultCode,
+                                                  int32_t cardReaderStatus) override;
+    Return<void> transferProtocolResponse(int32_t serial, V1_0::SapResultCode resultCode) override;
+
+  public:
+    void setResponseFunction(
+            const std::shared_ptr<aidl::android::hardware::radio::sap::ISapCallback>& callback);
+
+    std::shared_ptr<aidl::android::hardware::radio::sap::ISapCallback> respond();
+};
+
+}  // namespace android::hardware::radio::compat
diff --git a/radio/aidl/compat/libradiocompat/sap/Sap.cpp b/radio/aidl/compat/libradiocompat/sap/Sap.cpp
new file mode 100644
index 0000000..1a77169
--- /dev/null
+++ b/radio/aidl/compat/libradiocompat/sap/Sap.cpp
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2022 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.
+ */
+
+#include <libradiocompat/Sap.h>
+
+#include "commonStructs.h"
+#include "debug.h"
+#include "structs.h"
+
+#include "collections.h"
+
+#define RADIO_MODULE "Sap"
+
+namespace android::hardware::radio::compat {
+
+using ::ndk::ScopedAStatus;
+namespace aidl = ::aidl::android::hardware::radio::sap;
+constexpr auto ok = &ScopedAStatus::ok;
+
+Sap::Sap(sp<V1_0::ISap> hidlHal) : mHal(hidlHal), mSapCallback(sp<SapCallback>::make()) {}
+
+ScopedAStatus Sap::apduReq(int32_t serial, aidl::SapApduType type,
+                           const std::vector<uint8_t>& command) {
+    LOG_CALL << serial;
+    mHal->apduReq(serial, toHidl(type), toHidl(command));
+    return ok();
+}
+
+ScopedAStatus Sap::connectReq(int32_t serial, int32_t maxMsgSize) {
+    LOG_CALL << serial;
+    mHal->connectReq(serial, maxMsgSize);
+    return ok();
+}
+
+ScopedAStatus Sap::disconnectReq(int32_t serial) {
+    LOG_CALL << serial;
+    mHal->disconnectReq(serial);
+    return ok();
+}
+
+ScopedAStatus Sap::powerReq(int32_t serial, bool state) {
+    LOG_CALL << serial;
+    mHal->powerReq(serial, state);
+    return ok();
+}
+
+ScopedAStatus Sap::resetSimReq(int32_t serial) {
+    LOG_CALL << serial;
+    mHal->resetSimReq(serial);
+    return ok();
+}
+
+ScopedAStatus Sap::setCallback(
+        const std::shared_ptr<::aidl::android::hardware::radio::sap::ISapCallback>& sapCallback) {
+    LOG_CALL << sapCallback;
+
+    CHECK(sapCallback);
+
+    mSapCallback->setResponseFunction(sapCallback);
+    mHal->setCallback(mSapCallback).assertOk();
+    return ok();
+}
+ScopedAStatus Sap::setTransferProtocolReq(int32_t serial,
+                                          aidl::SapTransferProtocol transferProtocol) {
+    LOG_CALL << serial;
+    mHal->setTransferProtocolReq(serial, toHidl(transferProtocol));
+    return ok();
+}
+
+ScopedAStatus Sap::transferAtrReq(int32_t serial) {
+    LOG_CALL << serial;
+    mHal->transferAtrReq(serial);
+    return ok();
+}
+ScopedAStatus Sap::transferCardReaderStatusReq(int32_t serial) {
+    LOG_CALL << serial;
+    mHal->transferCardReaderStatusReq(serial);
+    return ok();
+}
+
+}  // namespace android::hardware::radio::compat
diff --git a/radio/aidl/compat/libradiocompat/sap/SapCallback.cpp b/radio/aidl/compat/libradiocompat/sap/SapCallback.cpp
new file mode 100644
index 0000000..a40dff8
--- /dev/null
+++ b/radio/aidl/compat/libradiocompat/sap/SapCallback.cpp
@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 2022 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.
+ */
+
+#include <libradiocompat/SapCallback.h>
+
+#include "commonStructs.h"
+#include "debug.h"
+#include "structs.h"
+
+#include "collections.h"
+
+#define RADIO_MODULE "SapCallback"
+
+namespace android::hardware::radio::compat {
+
+namespace aidl = ::aidl::android::hardware::radio::sap;
+
+void SapCallback::setResponseFunction(const std::shared_ptr<aidl::ISapCallback>& callback) {
+    mCallback = callback;
+}
+
+std::shared_ptr<aidl::ISapCallback> SapCallback::respond() {
+    return mCallback.get();
+}
+
+Return<void> SapCallback::apduResponse(int32_t serial, V1_0::SapResultCode resultCode,
+                                       const hidl_vec<uint8_t>& apduRsp) {
+    LOG_CALL << serial;
+    respond()->apduResponse(serial, toAidl(resultCode), apduRsp);
+    return {};
+}
+
+Return<void> SapCallback::connectResponse(int32_t serial, V1_0::SapConnectRsp sapConnectRsp,
+                                          int32_t maxMsgSize) {
+    LOG_CALL << serial;
+    respond()->connectResponse(serial, toAidl(sapConnectRsp), maxMsgSize);
+    return {};
+}
+
+Return<void> SapCallback::disconnectIndication(int32_t serial,
+                                               V1_0::SapDisconnectType disconnectType) {
+    LOG_CALL << serial;
+    respond()->disconnectIndication(serial, toAidl(disconnectType));
+    return {};
+}
+
+Return<void> SapCallback::disconnectResponse(int32_t serial) {
+    LOG_CALL << serial;
+    respond()->disconnectResponse(serial);
+    return {};
+}
+
+Return<void> SapCallback::errorResponse(int32_t serial) {
+    LOG_CALL << serial;
+    respond()->errorResponse(serial);
+    return {};
+}
+
+Return<void> SapCallback::powerResponse(int32_t serial, V1_0::SapResultCode resultCode) {
+    LOG_CALL << serial;
+    respond()->powerResponse(serial, toAidl(resultCode));
+    return {};
+}
+
+Return<void> SapCallback::resetSimResponse(int32_t serial, V1_0::SapResultCode resultCode) {
+    LOG_CALL << serial;
+    respond()->resetSimResponse(serial, toAidl(resultCode));
+    return {};
+}
+
+Return<void> SapCallback::statusIndication(int32_t serial, V1_0::SapStatus status) {
+    LOG_CALL << serial;
+    respond()->statusIndication(serial, toAidl(status));
+    return {};
+}
+
+Return<void> SapCallback::transferAtrResponse(int32_t serial, V1_0::SapResultCode resultCode,
+                                              const hidl_vec<uint8_t>& atr) {
+    LOG_CALL << serial;
+    respond()->transferAtrResponse(serial, toAidl(resultCode), atr);
+    return {};
+}
+
+Return<void> SapCallback::transferCardReaderStatusResponse(int32_t serial,
+                                                           V1_0::SapResultCode resultCode,
+                                                           int32_t cardReaderStatus) {
+    LOG_CALL << serial;
+    respond()->transferCardReaderStatusResponse(serial, toAidl(resultCode), cardReaderStatus);
+    return {};
+}
+
+Return<void> SapCallback::transferProtocolResponse(int32_t serial, V1_0::SapResultCode resultCode) {
+    LOG_CALL << serial;
+    respond()->transferProtocolResponse(serial, toAidl(resultCode));
+    return {};
+}
+
+}  // namespace android::hardware::radio::compat
diff --git a/radio/aidl/compat/libradiocompat/sap/structs.cpp b/radio/aidl/compat/libradiocompat/sap/structs.cpp
new file mode 100644
index 0000000..522056b
--- /dev/null
+++ b/radio/aidl/compat/libradiocompat/sap/structs.cpp
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2022 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.
+ */
+
+#include "structs.h"
+
+namespace android::hardware::radio::compat {
+
+namespace aidl = ::aidl::android::hardware::radio::sap;
+
+V1_0::SapApduType toHidl(const aidl::SapApduType sapApduType) {
+    return V1_0::SapApduType(sapApduType);
+}
+
+V1_0::SapTransferProtocol toHidl(const aidl::SapTransferProtocol sapTransferProtocol) {
+    return V1_0::SapTransferProtocol(sapTransferProtocol);
+}
+
+aidl::SapResultCode toAidl(const V1_0::SapResultCode sapResultCode) {
+    return aidl::SapResultCode(sapResultCode);
+}
+
+aidl::SapConnectRsp toAidl(const V1_0::SapConnectRsp sapConnectRsp) {
+    return aidl::SapConnectRsp(sapConnectRsp);
+}
+
+aidl::SapDisconnectType toAidl(const V1_0::SapDisconnectType sapDisconnectType) {
+    return aidl::SapDisconnectType(sapDisconnectType);
+}
+
+aidl::SapStatus toAidl(const V1_0::SapStatus sapStatus) {
+    return aidl::SapStatus(sapStatus);
+}
+
+}  // namespace android::hardware::radio::compat
diff --git a/radio/aidl/compat/libradiocompat/sap/structs.h b/radio/aidl/compat/libradiocompat/sap/structs.h
new file mode 100644
index 0000000..d88120d
--- /dev/null
+++ b/radio/aidl/compat/libradiocompat/sap/structs.h
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2022 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, eithe r express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#pragma once
+
+#include <aidl/android/hardware/radio/sap/ISap.h>
+#include <android/hardware/radio/1.0/types.h>
+
+namespace android::hardware::radio::compat {
+
+V1_0::SapApduType toHidl(aidl::android::hardware::radio::sap::SapApduType sapAdpuType);
+V1_0::SapTransferProtocol toHidl(
+        aidl::android::hardware::radio::sap::SapTransferProtocol sapTransferProtocol);
+
+aidl::android::hardware::radio::sap::SapResultCode toAidl(V1_0::SapResultCode sapResultCode);
+aidl::android::hardware::radio::sap::SapConnectRsp toAidl(V1_0::SapConnectRsp sapConnectRsp);
+aidl::android::hardware::radio::sap::SapDisconnectType toAidl(
+        V1_0::SapDisconnectType sapDisconnectType);
+aidl::android::hardware::radio::sap::SapStatus toAidl(V1_0::SapStatus sapStatus);
+
+}  // namespace android::hardware::radio::compat
diff --git a/radio/aidl/compat/service/Android.bp b/radio/aidl/compat/service/Android.bp
index 52eb71f..933e3e1 100644
--- a/radio/aidl/compat/service/Android.bp
+++ b/radio/aidl/compat/service/Android.bp
@@ -43,6 +43,7 @@
         "android.hardware.radio.messaging-V1-ndk",
         "android.hardware.radio.modem-V1-ndk",
         "android.hardware.radio.network-V1-ndk",
+        "android.hardware.radio.sap-V1-ndk",
         "android.hardware.radio.sim-V1-ndk",
         "android.hardware.radio.voice-V1-ndk",
         "android.hardware.radio@1.0",