diff --git a/radio/aidl/aidl_api/android.hardware.radio.data/current/android/hardware/radio/data/IRadioData.aidl b/radio/aidl/aidl_api/android.hardware.radio.data/current/android/hardware/radio/data/IRadioData.aidl
index dc6092a..7b572f1 100644
--- a/radio/aidl/aidl_api/android.hardware.radio.data/current/android/hardware/radio/data/IRadioData.aidl
+++ b/radio/aidl/aidl_api/android.hardware.radio.data/current/android/hardware/radio/data/IRadioData.aidl
@@ -44,7 +44,7 @@
   oneway void setDataAllowed(in int serial, in boolean allow);
   oneway void setDataProfile(in int serial, in android.hardware.radio.data.DataProfileInfo[] profiles);
   oneway void setDataThrottling(in int serial, in android.hardware.radio.data.DataThrottlingAction dataThrottlingAction, in long completionDurationMillis);
-  oneway void setInitialAttachApn(in int serial, in android.hardware.radio.data.DataProfileInfo dataProfileInfo);
+  oneway void setInitialAttachApn(in int serial, in @nullable android.hardware.radio.data.DataProfileInfo dataProfileInfo);
   oneway void setResponseFunctions(in android.hardware.radio.data.IRadioDataResponse radioDataResponse, in android.hardware.radio.data.IRadioDataIndication radioDataIndication);
   oneway void setupDataCall(in int serial, in android.hardware.radio.AccessNetwork accessNetwork, in android.hardware.radio.data.DataProfileInfo dataProfileInfo, in boolean roamingAllowed, in android.hardware.radio.data.DataRequestReason reason, in android.hardware.radio.data.LinkAddress[] addresses, in String[] dnses, in int pduSessionId, in @nullable android.hardware.radio.data.SliceInfo sliceInfo, in boolean matchAllRuleAllowed);
   oneway void startHandover(in int serial, in int callId);
diff --git a/radio/aidl/android/hardware/radio/data/IRadioData.aidl b/radio/aidl/android/hardware/radio/data/IRadioData.aidl
index 54a045c..e1ba568 100644
--- a/radio/aidl/android/hardware/radio/data/IRadioData.aidl
+++ b/radio/aidl/android/hardware/radio/data/IRadioData.aidl
@@ -159,14 +159,15 @@
             in long completionDurationMillis);
 
     /**
-     * Set an APN to initial attach network.
+     * Set an APN to initial attach network or clear the existing initial attach APN.
      *
      * @param serial Serial number of request.
-     * @param dataProfileInfo data profile containing APN settings
+     * @param dataProfileInfo Data profile containing APN settings or null to clear the existing
+     *        initial attach APN.
      *
      * Response function is IRadioDataResponse.setInitialAttachApnResponse()
      */
-    void setInitialAttachApn(in int serial, in DataProfileInfo dataProfileInfo);
+    void setInitialAttachApn(in int serial, in @nullable DataProfileInfo dataProfileInfo);
 
     /**
      * Set response functions for data radio requests and indications.
diff --git a/radio/aidl/compat/libradiocompat/data/RadioData.cpp b/radio/aidl/compat/libradiocompat/data/RadioData.cpp
index d2f3687..51f5543 100644
--- a/radio/aidl/compat/libradiocompat/data/RadioData.cpp
+++ b/radio/aidl/compat/libradiocompat/data/RadioData.cpp
@@ -122,9 +122,10 @@
     return ok();
 }
 
-ScopedAStatus RadioData::setInitialAttachApn(int32_t serial, const aidl::DataProfileInfo& info) {
+ScopedAStatus RadioData::setInitialAttachApn(int32_t serial,
+                                             const std::optional<aidl::DataProfileInfo>& info) {
     LOG_CALL << serial;
-    mHal1_5->setInitialAttachApn_1_5(serial, toHidl(info));
+    mHal1_5->setInitialAttachApn_1_5(serial, toHidl(info.value()));
     return ok();
 }
 
@@ -136,14 +137,15 @@
     return ok();
 }
 
-ScopedAStatus RadioData::setupDataCall(  //
-        int32_t serial, aidlCommon::AccessNetwork accessNetwork,
-        const aidl::DataProfileInfo& dataProfileInfo, bool roamingAllowed,
-        aidl::DataRequestReason reason, const std::vector<aidl::LinkAddress>& addresses,
-        const std::vector<std::string>& dnses, int32_t pduSessId,
-        const std::optional<aidl::SliceInfo>& sliceInfo, bool matchAllRuleAllowed) {
+ScopedAStatus RadioData::setupDataCall(int32_t serial, aidlCommon::AccessNetwork accessNetwork,
+                                       const aidl::DataProfileInfo& dataProfileInfo,
+                                       bool roamingAllowed, aidl::DataRequestReason reason,
+                                       const std::vector<aidl::LinkAddress>& addresses,
+                                       const std::vector<std::string>& dnses, int32_t pduSessId,
+                                       const std::optional<aidl::SliceInfo>& sliceInfo,
+                                       bool matchAllRuleAllowed) {
     if (mHal1_6) {
-        mHal1_6->setupDataCall_1_6(  //
+        mHal1_6->setupDataCall_1_6(
                 serial, V1_5::AccessNetwork(accessNetwork), toHidl(dataProfileInfo), roamingAllowed,
                 V1_2::DataRequestReason(reason), toHidl(addresses), toHidl(dnses), pduSessId,
                 toHidl<V1_6::OptionalSliceInfo>(sliceInfo),
@@ -151,7 +153,7 @@
                 matchAllRuleAllowed);
         mContext->addDataProfile(dataProfileInfo);
     } else {
-        mHal1_5->setupDataCall_1_5(  //
+        mHal1_5->setupDataCall_1_5(
                 serial, V1_5::AccessNetwork(accessNetwork), toHidl(dataProfileInfo), roamingAllowed,
                 V1_2::DataRequestReason(reason), toHidl(addresses), toHidl(dnses));
     }
diff --git a/radio/aidl/compat/libradiocompat/include/libradiocompat/RadioData.h b/radio/aidl/compat/libradiocompat/include/libradiocompat/RadioData.h
index c617ec2..c2c0de3 100644
--- a/radio/aidl/compat/libradiocompat/include/libradiocompat/RadioData.h
+++ b/radio/aidl/compat/libradiocompat/include/libradiocompat/RadioData.h
@@ -44,7 +44,8 @@
             int64_t completionDurationMillis) override;
     ::ndk::ScopedAStatus setInitialAttachApn(
             int32_t serial,
-            const ::aidl::android::hardware::radio::data::DataProfileInfo& dpInfo) override;
+            const std::optional<::aidl::android::hardware::radio::data::DataProfileInfo>& dpInfo)
+            override;
     ::ndk::ScopedAStatus setResponseFunctions(
             const std::shared_ptr<::aidl::android::hardware::radio::data::IRadioDataResponse>&
                     radioDataResponse,