diff --git a/src/com/android/phone/TelephonyShellCommand.java b/src/com/android/phone/TelephonyShellCommand.java
index 463cdb1..0cf120a 100644
--- a/src/com/android/phone/TelephonyShellCommand.java
+++ b/src/com/android/phone/TelephonyShellCommand.java
@@ -21,6 +21,8 @@
 import static com.android.internal.telephony.d2d.Communicator.MESSAGE_DEVICE_BATTERY_STATE;
 import static com.android.internal.telephony.d2d.Communicator.MESSAGE_DEVICE_NETWORK_COVERAGE;
 
+import static java.util.Map.entry;
+
 import android.Manifest;
 import android.content.Context;
 import android.net.Uri;
@@ -61,7 +63,6 @@
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
-import java.util.HashMap;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
@@ -204,33 +205,32 @@
     // For instance: "xxxx_string", "xxxx_string_array", etc.
     // The carrier config keys in this map does not follow this convention. It is therefore not
     // possible to infer the type for these keys by looking at the string.
-    private static final Map<String, CcType> CC_TYPE_MAP = new HashMap<String, CcType>() {{
-            put(CarrierConfigManager.Gps.KEY_A_GLONASS_POS_PROTOCOL_SELECT_STRING, CcType.STRING);
-            put(CarrierConfigManager.Gps.KEY_ES_EXTENSION_SEC_STRING, CcType.STRING);
-            put(CarrierConfigManager.Gps.KEY_GPS_LOCK_STRING, CcType.STRING);
-            put(CarrierConfigManager.Gps.KEY_LPP_PROFILE_STRING, CcType.STRING);
-            put(CarrierConfigManager.Gps.KEY_NFW_PROXY_APPS_STRING, CcType.STRING);
-            put(CarrierConfigManager.Gps.KEY_SUPL_ES_STRING, CcType.STRING);
-            put(CarrierConfigManager.Gps.KEY_SUPL_HOST_STRING, CcType.STRING);
-            put(CarrierConfigManager.Gps.KEY_SUPL_MODE_STRING, CcType.STRING);
-            put(CarrierConfigManager.Gps.KEY_SUPL_PORT_STRING, CcType.STRING);
-            put(CarrierConfigManager.Gps.KEY_SUPL_VER_STRING, CcType.STRING);
-            put(CarrierConfigManager.Gps.KEY_USE_EMERGENCY_PDN_FOR_EMERGENCY_SUPL_STRING,
-                    CcType.STRING);
-            put(CarrierConfigManager.KEY_CARRIER_APP_NO_WAKE_SIGNAL_CONFIG_STRING_ARRAY,
-                    CcType.STRING_ARRAY);
-            put(CarrierConfigManager.KEY_CARRIER_APP_WAKE_SIGNAL_CONFIG_STRING_ARRAY,
-                    CcType.STRING_ARRAY);
-            put(CarrierConfigManager.KEY_CARRIER_CALL_SCREENING_APP_STRING, CcType.STRING);
-            put(CarrierConfigManager.KEY_MMS_EMAIL_GATEWAY_NUMBER_STRING, CcType.STRING);
-            put(CarrierConfigManager.KEY_MMS_HTTP_PARAMS_STRING, CcType.STRING);
-            put(CarrierConfigManager.KEY_MMS_NAI_SUFFIX_STRING, CcType.STRING);
-            put(CarrierConfigManager.KEY_MMS_UA_PROF_TAG_NAME_STRING, CcType.STRING);
-            put(CarrierConfigManager.KEY_MMS_UA_PROF_URL_STRING, CcType.STRING);
-            put(CarrierConfigManager.KEY_MMS_USER_AGENT_STRING, CcType.STRING);
-            put(CarrierConfigManager.KEY_RATCHET_RAT_FAMILIES, CcType.STRING_ARRAY);
-        }
-    };
+    private static final Map<String, CcType> CC_TYPE_MAP = Map.ofEntries(
+            entry(CarrierConfigManager.Gps.KEY_A_GLONASS_POS_PROTOCOL_SELECT_STRING,
+                    CcType.STRING),
+            entry(CarrierConfigManager.Gps.KEY_ES_EXTENSION_SEC_STRING, CcType.STRING),
+            entry(CarrierConfigManager.Gps.KEY_GPS_LOCK_STRING, CcType.STRING),
+            entry(CarrierConfigManager.Gps.KEY_LPP_PROFILE_STRING, CcType.STRING),
+            entry(CarrierConfigManager.Gps.KEY_NFW_PROXY_APPS_STRING, CcType.STRING),
+            entry(CarrierConfigManager.Gps.KEY_SUPL_ES_STRING, CcType.STRING),
+            entry(CarrierConfigManager.Gps.KEY_SUPL_HOST_STRING, CcType.STRING),
+            entry(CarrierConfigManager.Gps.KEY_SUPL_MODE_STRING, CcType.STRING),
+            entry(CarrierConfigManager.Gps.KEY_SUPL_PORT_STRING, CcType.STRING),
+            entry(CarrierConfigManager.Gps.KEY_SUPL_VER_STRING, CcType.STRING),
+            entry(CarrierConfigManager.Gps.KEY_USE_EMERGENCY_PDN_FOR_EMERGENCY_SUPL_STRING,
+                    CcType.STRING),
+            entry(CarrierConfigManager.KEY_CARRIER_APP_NO_WAKE_SIGNAL_CONFIG_STRING_ARRAY,
+                    CcType.STRING_ARRAY),
+            entry(CarrierConfigManager.KEY_CARRIER_APP_WAKE_SIGNAL_CONFIG_STRING_ARRAY,
+                    CcType.STRING_ARRAY),
+            entry(CarrierConfigManager.KEY_CARRIER_CALL_SCREENING_APP_STRING, CcType.STRING),
+            entry(CarrierConfigManager.KEY_MMS_EMAIL_GATEWAY_NUMBER_STRING, CcType.STRING),
+            entry(CarrierConfigManager.KEY_MMS_HTTP_PARAMS_STRING, CcType.STRING),
+            entry(CarrierConfigManager.KEY_MMS_NAI_SUFFIX_STRING, CcType.STRING),
+            entry(CarrierConfigManager.KEY_MMS_UA_PROF_TAG_NAME_STRING, CcType.STRING),
+            entry(CarrierConfigManager.KEY_MMS_UA_PROF_URL_STRING, CcType.STRING),
+            entry(CarrierConfigManager.KEY_MMS_USER_AGENT_STRING, CcType.STRING),
+            entry(CarrierConfigManager.KEY_RATCHET_RAT_FAMILIES, CcType.STRING_ARRAY));
 
     /**
      * Map from a shorthand string to the feature tags required in registration required in order
diff --git a/src/com/android/phone/settings/RadioInfo.java b/src/com/android/phone/settings/RadioInfo.java
index 8289883..7c2c829 100644
--- a/src/com/android/phone/settings/RadioInfo.java
+++ b/src/com/android/phone/settings/RadioInfo.java
@@ -757,6 +757,7 @@
         mCellInfoRefreshRateIndex = b.getInt("mCellInfoRefreshRateIndex", 0);
     }
 
+    @SuppressWarnings("MissingSuperCall") // TODO: Fix me
     @Override
     protected void onSaveInstanceState(Bundle outState) {
         outState.putString("mPingHostnameResultV4", mPingHostnameResultV4);
diff --git a/src/com/android/phone/slicestore/SliceStore.java b/src/com/android/phone/slicestore/SliceStore.java
index 7d098ca..20245f6 100644
--- a/src/com/android/phone/slicestore/SliceStore.java
+++ b/src/com/android/phone/slicestore/SliceStore.java
@@ -233,9 +233,8 @@
                     logd("Purchase premium capability request was not made on the default data "
                             + "subscription for capability: "
                             + TelephonyManager.convertPremiumCapabilityToString(capability));
-                    // TODO: change to RESULT_NOT_DEFAULT_DATA after ag/20196642 is merged
                     SliceStore.getInstance(phoneId).sendPurchaseResultFromSliceStore(capability,
-                            TelephonyManager.PURCHASE_PREMIUM_CAPABILITY_RESULT_REQUEST_FAILED,
+                            TelephonyManager.PURCHASE_PREMIUM_CAPABILITY_RESULT_NOT_DEFAULT_DATA,
                             false);
                     break;
                 }
@@ -338,8 +337,10 @@
                     + " unsupported by the carrier.");
             return false;
         }
-        if (!arePremiumCapabilitiesEnabledByUser()) {
-            logd("Premium capabilities disabled by the user.");
+        if (!isDefaultData()) {
+            logd("Premium capability "
+                    + TelephonyManager.convertPremiumCapabilityToString(capability)
+                    + " unavailable on the non-default data subscription.");
             return false;
         }
         logd("Premium capability "
@@ -373,9 +374,9 @@
                     onComplete);
             return;
         }
-        if (!arePremiumCapabilitiesEnabledByUser()) {
+        if (!isDefaultData()) {
             sendPurchaseResult(capability,
-                    TelephonyManager.PURCHASE_PREMIUM_CAPABILITY_RESULT_USER_DISABLED,
+                    TelephonyManager.PURCHASE_PREMIUM_CAPABILITY_RESULT_NOT_DEFAULT_DATA,
                     onComplete);
             return;
         }
@@ -392,7 +393,7 @@
                     onComplete);
             return;
         }
-        if (mPhone.getServiceState().getDataNetworkType() != TelephonyManager.NETWORK_TYPE_NR) {
+        if (!isNetworkAvailable()) {
             sendPurchaseResult(capability,
                     TelephonyManager.PURCHASE_PREMIUM_CAPABILITY_RESULT_NETWORK_NOT_AVAILABLE,
                     onComplete);
@@ -583,9 +584,8 @@
                 & TelephonyManager.NETWORK_TYPE_BITMASK_NR) != 0;
     }
 
-    private boolean arePremiumCapabilitiesEnabledByUser() {
-        // TODO(b/245882396): Create and set user settings
-        return false;
+    private boolean isDefaultData() {
+        return mPhone.getSubId() == SubscriptionManager.getDefaultDataSubscriptionId();
     }
 
     private boolean isSlicingConfigActive(@TelephonyManager.PremiumCapability int capability) {
@@ -609,6 +609,20 @@
         return NetworkSliceInfo.SLICE_SERVICE_TYPE_NONE;
     }
 
+    private boolean isNetworkAvailable() {
+        // TODO (b/251558673): Create a listener for data network type changed to dismiss
+        //  notification and activity when the network is no longer available.
+        switch (mPhone.getServiceState().getDataNetworkType()) {
+            case TelephonyManager.NETWORK_TYPE_NR:
+                return true;
+            case TelephonyManager.NETWORK_TYPE_LTE:
+            case TelephonyManager.NETWORK_TYPE_LTE_CA:
+                return getCarrierConfigs().getBoolean(
+                        CarrierConfigManager.KEY_PREMIUM_CAPABILITY_SUPPORTED_ON_LTE_BOOL);
+        }
+        return false;
+    }
+
     private boolean isNetworkCongested(@TelephonyManager.PremiumCapability int capability) {
         // TODO: Implement TS43
         return true;
diff --git a/src/com/android/services/telephony/TelephonyConnectionService.java b/src/com/android/services/telephony/TelephonyConnectionService.java
index e369d37..65852d9 100644
--- a/src/com/android/services/telephony/TelephonyConnectionService.java
+++ b/src/com/android/services/telephony/TelephonyConnectionService.java
@@ -78,12 +78,12 @@
 import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
-import java.util.HashSet;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.Objects;
 import java.util.Queue;
+import java.util.Set;
 import java.util.concurrent.CompletableFuture;
 import java.util.function.Consumer;
 import java.util.regex.Pattern;
@@ -2555,9 +2555,7 @@
                        return;
                    }
 
-                   c.sendMessages(new HashSet<Communicator.Message>() {{
-                       add(new Communicator.Message(message, value));
-                   }});
+                   c.sendMessages(Set.of(new Communicator.Message(message, value)));
 
                });
     }
diff --git a/testapps/EmbmsServiceTestApp/src/com/android/phone/testapps/embmsmw/EmbmsSampleDownloadService.java b/testapps/EmbmsServiceTestApp/src/com/android/phone/testapps/embmsmw/EmbmsSampleDownloadService.java
index 3d83a4c..edb3c47 100644
--- a/testapps/EmbmsServiceTestApp/src/com/android/phone/testapps/embmsmw/EmbmsSampleDownloadService.java
+++ b/testapps/EmbmsServiceTestApp/src/com/android/phone/testapps/embmsmw/EmbmsSampleDownloadService.java
@@ -58,9 +58,8 @@
 import java.util.concurrent.ConcurrentHashMap;
 
 public class EmbmsSampleDownloadService extends Service {
-    private static final Set<String> ALLOWED_PACKAGES = new HashSet<String>() {{
-        add("com.android.phone.testapps.embmsdownload");
-    }};
+    private static final Set<String> ALLOWED_PACKAGES = Set.of(
+            "com.android.phone.testapps.embmsdownload");
 
     private static final String LOG_TAG = "EmbmsSampleDownload";
     private static final long INITIALIZATION_DELAY = 200;
diff --git a/testapps/EmbmsServiceTestApp/src/com/android/phone/testapps/embmsmw/EmbmsTestStreamingService.java b/testapps/EmbmsServiceTestApp/src/com/android/phone/testapps/embmsmw/EmbmsTestStreamingService.java
index f50536c..58afe98 100644
--- a/testapps/EmbmsServiceTestApp/src/com/android/phone/testapps/embmsmw/EmbmsTestStreamingService.java
+++ b/testapps/EmbmsServiceTestApp/src/com/android/phone/testapps/embmsmw/EmbmsTestStreamingService.java
@@ -35,15 +35,13 @@
 
 import java.util.Arrays;
 import java.util.HashMap;
-import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
 
 public class EmbmsTestStreamingService extends Service {
-    private static final Set<String> ALLOWED_PACKAGES = new HashSet<String>() {{
-        add("com.android.phone.testapps.embmsfrontend");
-    }};
+    private static final Set<String> ALLOWED_PACKAGES = Set.of(
+            "com.android.phone.testapps.embmsfrontend");
 
     private static final String TAG = "EmbmsTestStreaming";
 
diff --git a/testapps/EmbmsServiceTestApp/src/com/android/phone/testapps/embmsmw/FileServiceRepository.java b/testapps/EmbmsServiceTestApp/src/com/android/phone/testapps/embmsmw/FileServiceRepository.java
index 27911f6..fe345f3 100644
--- a/testapps/EmbmsServiceTestApp/src/com/android/phone/testapps/embmsmw/FileServiceRepository.java
+++ b/testapps/EmbmsServiceTestApp/src/com/android/phone/testapps/embmsmw/FileServiceRepository.java
@@ -81,14 +81,10 @@
     private void createFileService(String className, Uri... filesIncluded) {
         sServiceIdCounter++;
         String id = "FileServiceId[" + sServiceIdCounter + "]";
-        List<Locale> locales = new ArrayList<Locale>(2) {{
-            add(Locale.US);
-            add(Locale.UK);
-        }};
-        Map<Locale, String> localeDict = new HashMap<Locale, String>() {{
-            put(Locale.US, "File Source " + sServiceIdCounter);
-            put(Locale.UK, "File Source with extra vowels " + sServiceIdCounter);
-        }};
+        List<Locale> locales = List.of(Locale.US, Locale.UK);
+        Map<Locale, String> localeDict = Map.of(
+                Locale.US, "File Source " + sServiceIdCounter,
+                Locale.UK, "File Source with extra vowels " + sServiceIdCounter);
         List<FileInfo> fileInfos = Arrays.stream(filesIncluded)
                 .map(this::getFileInfoForUri)
                 .collect(Collectors.toList());
diff --git a/testapps/EmbmsServiceTestApp/src/com/android/phone/testapps/embmsmw/StreamingServiceRepository.java b/testapps/EmbmsServiceTestApp/src/com/android/phone/testapps/embmsmw/StreamingServiceRepository.java
index e1a12e3..e49dea5 100644
--- a/testapps/EmbmsServiceTestApp/src/com/android/phone/testapps/embmsmw/StreamingServiceRepository.java
+++ b/testapps/EmbmsServiceTestApp/src/com/android/phone/testapps/embmsmw/StreamingServiceRepository.java
@@ -19,7 +19,6 @@
 import android.net.Uri;
 import android.telephony.mbms.StreamingServiceInfo;
 
-import java.util.ArrayList;
 import java.util.Date;
 import java.util.HashMap;
 import java.util.List;
@@ -61,14 +60,10 @@
     private static void createStreamingService(String className) {
         sServiceIdCounter++;
         String id = "StreamingServiceId[" + sServiceIdCounter + "]";
-        Map<Locale, String> localeDict = new HashMap<Locale, String>() {{
-                put(Locale.US, "Entertainment Source " + sServiceIdCounter);
-                put(Locale.CANADA, "Entertainment Source, eh?" + sServiceIdCounter);
-        }};
-        List<Locale> locales = new ArrayList<Locale>() {{
-                add(Locale.CANADA);
-                add(Locale.US);
-        }};
+        Map<Locale, String> localeDict = Map.of(
+                Locale.US, "Entertainment Source " + sServiceIdCounter,
+                Locale.CANADA, "Entertainment Source, eh?" + sServiceIdCounter);
+        List<Locale> locales = List.of(Locale.CANADA, Locale.US);
         StreamingServiceInfo info = new StreamingServiceInfo(localeDict, className, locales,
                 id, new Date(System.currentTimeMillis() - 10000),
                 new Date(System.currentTimeMillis() + 10000));
diff --git a/testapps/TelephonyManagerTestApp/src/com/android/phone/testapps/telephonymanagertestapp/ParameterParser.java b/testapps/TelephonyManagerTestApp/src/com/android/phone/testapps/telephonymanagertestapp/ParameterParser.java
index ccb5639..28408f9 100644
--- a/testapps/TelephonyManagerTestApp/src/com/android/phone/testapps/telephonymanagertestapp/ParameterParser.java
+++ b/testapps/TelephonyManagerTestApp/src/com/android/phone/testapps/telephonymanagertestapp/ParameterParser.java
@@ -25,7 +25,6 @@
 
 import java.util.Arrays;
 import java.util.Collections;
-import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.Executor;
@@ -44,15 +43,13 @@
     }
 
     private final Context mContext;
-    private final Map<Class, Function<String, Object>> mParsers =
-            new HashMap<Class, Function<String, Object>>() {{
-                put(PhoneNumberRange.class, ParameterParser::parsePhoneNumberRange);
-                put(Executor.class, s -> parseExecutor(s));
-                put(NumberVerificationCallback.class, s -> parseNumberVerificationCallback(s));
-                put(Consumer.class, s -> parseConsumer(s));
-                put(List.class, s -> parseList(s));
-                put(RadioAccessSpecifier.class, s -> parseRadioAccessSpecifier(s));
-            }};
+    private final Map<Class, Function<String, Object>> mParsers = Map.of(
+            PhoneNumberRange.class, ParameterParser::parsePhoneNumberRange,
+            Executor.class, s -> parseExecutor(s),
+            NumberVerificationCallback.class, s -> parseNumberVerificationCallback(s),
+            Consumer.class, s -> parseConsumer(s),
+            List.class, s -> parseList(s),
+            RadioAccessSpecifier.class, s -> parseRadioAccessSpecifier(s));
 
     private ParameterParser(Context context) {
         mContext = context;
diff --git a/testapps/TestRcsApp/TestApp/src/com/google/android/sample/rcsclient/FileUploadActivity.java b/testapps/TestRcsApp/TestApp/src/com/google/android/sample/rcsclient/FileUploadActivity.java
index b9078f8..cfb75bc 100644
--- a/testapps/TestRcsApp/TestApp/src/com/google/android/sample/rcsclient/FileUploadActivity.java
+++ b/testapps/TestRcsApp/TestApp/src/com/google/android/sample/rcsclient/FileUploadActivity.java
@@ -189,6 +189,7 @@
         });
     }
 
+    @SuppressWarnings("MissingSuperCall") // TODO: fix me
     @Override
     public void onActivityResult(int requestCode, int resultCode, Intent data) {
         switch (requestCode) {