diff --git a/src/com/android/settings/network/apn/ApnEditPageProvider.kt b/src/com/android/settings/network/apn/ApnEditPageProvider.kt
index cea2b44..eda9d7a 100644
--- a/src/com/android/settings/network/apn/ApnEditPageProvider.kt
+++ b/src/com/android/settings/network/apn/ApnEditPageProvider.kt
@@ -38,17 +38,10 @@
 import androidx.navigation.NavType
 import androidx.navigation.navArgument
 import com.android.settings.R
-import com.android.settings.network.apn.ApnNetworkTypes.getNetworkTypeDisplayNames
-import com.android.settings.network.apn.ApnNetworkTypes.getNetworkTypeSelectedOptionsState
-import com.android.settings.network.apn.ApnTypes.APN_TYPES_OPTIONS
-import com.android.settings.network.apn.ApnTypes.APN_TYPE_MMS
-import com.android.settings.network.apn.ApnTypes.getApnTypeSelectedOptionsState
-import com.android.settings.network.apn.ApnTypes.updateApnType
 import com.android.settingslib.spa.framework.common.SettingsPageProvider
 import com.android.settingslib.spa.framework.compose.LocalNavController
 import com.android.settingslib.spa.framework.theme.SettingsDimension
 import com.android.settingslib.spa.widget.editor.SettingsExposedDropdownMenuBox
-import com.android.settingslib.spa.widget.editor.SettingsExposedDropdownMenuCheckBox
 import com.android.settingslib.spa.widget.editor.SettingsOutlinedTextField
 import com.android.settingslib.spa.widget.editor.SettingsTextFieldPassword
 import com.android.settingslib.spa.widget.preference.SwitchPreference
@@ -79,7 +72,7 @@
         val uriString = arguments!!.getString(URI)
         val uriInit = Uri.parse(String(Base64.getDecoder().decode(uriString)))
         val subId = arguments.getInt(SUB_ID)
-        val apnDataInit = getApnDataInit(arguments, LocalContext.current, uriInit, subId)
+        val apnDataInit = getApnDataInit(arguments, LocalContext.current, uriInit, subId) ?: return
         val apnDataCur = remember {
             mutableStateOf(apnDataInit)
         }
@@ -101,12 +94,7 @@
     val context = LocalContext.current
     val authTypeOptions = stringArrayResource(R.array.apn_auth_entries).toList()
     val apnProtocolOptions = stringArrayResource(R.array.apn_protocol_entries).toList()
-    val networkTypeSelectedOptionsState = remember {
-        getNetworkTypeSelectedOptionsState(apnData.networkType)
-    }
-    var apnTypeSelectedOptionsState = remember {
-        getApnTypeSelectedOptionsState(apnData.apnType)
-    }
+    var apnTypeMmsSelected by remember { mutableStateOf(false) }
     val navController = LocalNavController.current
     var valid: String?
     RegularScaffold(
@@ -114,11 +102,6 @@
         actions = {
             if (!apnData.customizedConfig.readOnlyApn) {
                 Button(onClick = {
-                    apnData = apnData.copy(
-                        networkType = ApnNetworkTypes.getNetworkType(
-                            networkTypeSelectedOptionsState
-                        )
-                    )
                     valid = validateAndSaveApnData(
                         apnDataInit,
                         apnData,
@@ -193,27 +176,12 @@
                 label = stringResource(R.string.apn_server),
                 enabled = apnData.serverEnabled
             ) { apnData = apnData.copy(server = it) }
-            SettingsExposedDropdownMenuCheckBox(
-                label = stringResource(R.string.apn_type),
-                options = APN_TYPES_OPTIONS,
-                selectedOptionsState = apnTypeSelectedOptionsState,
-                enabled = apnData.apnTypeEnabled,
-                errorMessage = validateAPNType(
-                    apnData.validEnabled, apnData.apnType,
-                    apnData.customizedConfig.readOnlyApnTypes, context
-                )
-            ) {
-                val apnType = updateApnType(
-                    apnTypeSelectedOptionsState,
-                    apnData.customizedConfig.defaultApnTypes,
-                    apnData.customizedConfig.readOnlyApnTypes
-                )
-                apnTypeSelectedOptionsState = getApnTypeSelectedOptionsState(apnType)
-                apnData = apnData.copy(
-                    apnType = apnType
-                )
-            }
-            if (apnTypeSelectedOptionsState.contains(APN_TYPES_OPTIONS.indexOf(APN_TYPE_MMS))) {
+            ApnTypeCheckBox(
+                apnData = apnData,
+                onTypeChanged = { apnData = apnData.copy(apnType = it) },
+                onMmsSelectedChanged = { apnTypeMmsSelected = it },
+            )
+            if (apnTypeMmsSelected) {
                 SettingsOutlinedTextField(
                     value = apnData.mmsc,
                     label = stringResource(R.string.apn_mmsc),
@@ -249,13 +217,7 @@
                 selectedOptionIndex = apnData.apnRoaming,
                 enabled = apnData.apnRoamingEnabled
             ) { apnData = apnData.copy(apnRoaming = it) }
-            SettingsExposedDropdownMenuCheckBox(
-                label = stringResource(R.string.network_type),
-                options = getNetworkTypeDisplayNames(),
-                selectedOptionsState = networkTypeSelectedOptionsState,
-                emptyVal = stringResource(R.string.network_type_unspecified),
-                enabled = apnData.networkTypeEnabled
-            ) {}
+            ApnNetworkTypeCheckBox(apnData) { apnData = apnData.copy(networkType = it) }
             SwitchPreference(
                 object : SwitchPreferenceModel {
                     override val title = context.resources.getString(R.string.carrier_enabled)
diff --git a/src/com/android/settings/network/apn/ApnNetworkTypeCheckBox.kt b/src/com/android/settings/network/apn/ApnNetworkTypeCheckBox.kt
new file mode 100644
index 0000000..bc85f55
--- /dev/null
+++ b/src/com/android/settings/network/apn/ApnNetworkTypeCheckBox.kt
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2024 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 com.android.settings.network.apn
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import androidx.compose.ui.res.stringResource
+import com.android.settings.R
+import com.android.settingslib.spa.widget.editor.SettingsDropdownCheckBox
+
+@Composable
+fun ApnNetworkTypeCheckBox(apnData: ApnData, onNetworkTypeChanged: (Long) -> Unit) {
+    val options = remember { ApnNetworkTypes.getNetworkTypeOptions() }
+    val selectedStateMap = remember {
+        ApnNetworkTypes.networkTypeToSelectedStateMap(options, apnData.networkType)
+    }
+    SettingsDropdownCheckBox(
+        label = stringResource(R.string.network_type),
+        options = options,
+        emptyText = stringResource(R.string.network_type_unspecified),
+        enabled = apnData.networkTypeEnabled,
+    ) {
+        onNetworkTypeChanged(
+            ApnNetworkTypes.selectedStateMapToNetworkType(options, selectedStateMap)
+        )
+    }
+}
diff --git a/src/com/android/settings/network/apn/ApnNetworkTypes.kt b/src/com/android/settings/network/apn/ApnNetworkTypes.kt
index 0ccd33a..e7a93b3 100644
--- a/src/com/android/settings/network/apn/ApnNetworkTypes.kt
+++ b/src/com/android/settings/network/apn/ApnNetworkTypes.kt
@@ -17,8 +17,9 @@
 package com.android.settings.network.apn
 
 import android.telephony.TelephonyManager
-import androidx.compose.runtime.mutableStateListOf
-import androidx.compose.runtime.snapshots.SnapshotStateList
+import androidx.compose.runtime.mutableStateMapOf
+import androidx.compose.runtime.snapshots.SnapshotStateMap
+import com.android.settingslib.spa.widget.editor.SettingsDropdownCheckOption
 
 object ApnNetworkTypes {
     private val Types = listOf(
@@ -39,32 +40,40 @@
         TelephonyManager.NETWORK_TYPE_NR,
     )
 
-    fun getNetworkTypeDisplayNames(): List<String> =
-        Types.map { TelephonyManager.getNetworkTypeName(it) }
+    fun getNetworkTypeOptions(): List<SettingsDropdownCheckOption> =
+        Types.map { SettingsDropdownCheckOption(TelephonyManager.getNetworkTypeName(it)) }
 
     /**
      * Gets the selected Network type Selected Options according to network type.
      * @param networkType Initialized network type bitmask, often multiple network type options may
      *                    be included.
      */
-    fun getNetworkTypeSelectedOptionsState(networkType: Long): SnapshotStateList<Int> {
-        val networkTypeSelectedOptionsState = mutableStateListOf<Int>()
+    fun networkTypeToSelectedStateMap(
+        options: List<SettingsDropdownCheckOption>,
+        networkType: Long,
+    ): SnapshotStateMap<SettingsDropdownCheckOption, Boolean> {
+        val stateMap = mutableStateMapOf<SettingsDropdownCheckOption, Boolean>()
         Types.forEachIndexed { index, type ->
             if (networkType and TelephonyManager.getBitMaskForNetworkType(type) != 0L) {
-                networkTypeSelectedOptionsState.add(index)
+                stateMap[options[index]] = true
             }
         }
-        return networkTypeSelectedOptionsState
+        return stateMap
     }
 
     /**
      * Gets the network type according to the selected Network type Selected Options.
-     * @param networkTypeSelectedOptionsState the selected Network type Selected Options.
+     * @param stateMap the selected Network type Selected Options.
      */
-    fun getNetworkType(networkTypeSelectedOptionsState: SnapshotStateList<Int>): Long {
+    fun selectedStateMapToNetworkType(
+        options: List<SettingsDropdownCheckOption>,
+        stateMap: SnapshotStateMap<SettingsDropdownCheckOption, Boolean>,
+    ): Long {
         var networkType = 0L
-        networkTypeSelectedOptionsState.forEach { option ->
-            networkType = networkType or TelephonyManager.getBitMaskForNetworkType(Types[option])
+        options.forEachIndexed { index, option ->
+            if (stateMap[option] == true) {
+                networkType = networkType or TelephonyManager.getBitMaskForNetworkType(Types[index])
+            }
         }
         return networkType
     }
diff --git a/src/com/android/settings/network/apn/ApnStatus.kt b/src/com/android/settings/network/apn/ApnStatus.kt
index ec2f687..ab16f1c 100644
--- a/src/com/android/settings/network/apn/ApnStatus.kt
+++ b/src/com/android/settings/network/apn/ApnStatus.kt
@@ -22,17 +22,9 @@
 import android.os.Bundle
 import android.provider.Telephony
 import android.telephony.CarrierConfigManager
-import android.text.TextUtils
 import android.util.Log
-import com.android.internal.util.ArrayUtils
 import com.android.settings.R
-import com.android.settings.network.apn.ApnTypes.APN_TYPES
-import com.android.settings.network.apn.ApnTypes.APN_TYPE_ALL
-import com.android.settings.network.apn.ApnTypes.APN_TYPE_EMERGENCY
-import com.android.settings.network.apn.ApnTypes.APN_TYPE_IA
-import com.android.settings.network.apn.ApnTypes.APN_TYPE_IMS
-import com.android.settings.network.apn.ApnTypes.APN_TYPE_MCX
-import java.util.Locale
+import com.android.settings.network.apn.ApnTypes.getPreSelectedApnType
 
 private const val TAG = "ApnStatus"
 
@@ -108,7 +100,7 @@
     val isAddApnAllowed: Boolean = true,
     val readOnlyApnTypes: List<String> = emptyList(),
     val readOnlyApnFields: List<String> = emptyList(),
-    val defaultApnTypes: List<String> = emptyList(),
+    val defaultApnTypes: List<String>? = null,
     val defaultApnProtocol: String = "",
     val defaultApnRoamingProtocol: String = "",
 )
@@ -121,19 +113,18 @@
  *
  * @return Initialized CustomizedConfig information.
  */
-fun getApnDataInit(arguments: Bundle, context: Context, uriInit: Uri, subId: Int): ApnData {
-
-    val uriType = arguments.getString(URI_TYPE)!!
+fun getApnDataInit(arguments: Bundle, context: Context, uriInit: Uri, subId: Int): ApnData? {
+    val uriType = arguments.getString(URI_TYPE) ?: return null
 
     if (!uriInit.isPathPrefixMatch(Telephony.Carriers.CONTENT_URI)) {
         Log.e(TAG, "Insert request not for carrier table. Uri: $uriInit")
-        return ApnData() //TODO: finish
+        return null
     }
 
     var apnDataInit = when (uriType) {
         EDIT_URL -> getApnDataFromUri(uriInit, context)
         INSERT_URL -> ApnData()
-        else -> ApnData() //TODO: finish
+        else -> return null
     }
 
     if (uriType == INSERT_URL) {
@@ -146,13 +137,18 @@
     apnDataInit =
         apnDataInit.copy(customizedConfig = getCarrierCustomizedConfig(apnDataInit, configManager))
 
+    if (apnDataInit.newApn) {
+        apnDataInit = apnDataInit.copy(
+            apnType = getPreSelectedApnType(apnDataInit.customizedConfig)
+        )
+    }
+
     apnDataInit = apnDataInit.copy(
         apnEnableEnabled =
         context.resources.getBoolean(R.bool.config_allow_edit_carrier_enabled)
     )
     // TODO: mIsCarrierIdApn
-    disableInit(apnDataInit)
-    return apnDataInit
+    return disableInit(apnDataInit)
 }
 
 /**
@@ -202,55 +198,9 @@
     if (errorMsg == null) {
         errorMsg = isItemExist(apnData, context)
     }
-    if (errorMsg == null) {
-        errorMsg = validateAPNType(
-            true,
-            apnData.apnType,
-            apnData.customizedConfig.readOnlyApnTypes,
-            context
-        )
-    }
     return errorMsg?.apply { Log.d(TAG, "APN data not valid, reason: $this") }
 }
 
-private fun getUserEnteredApnType(apnType: String, readOnlyApnTypes: List<String>): String {
-    // if user has not specified a type, map it to "ALL APN TYPES THAT ARE NOT READ-ONLY"
-    // but if user enter empty type, map it just for default
-    var userEnteredApnType = apnType
-    if (userEnteredApnType != "") userEnteredApnType =
-        userEnteredApnType.trim { it <= ' ' }
-    if (TextUtils.isEmpty(userEnteredApnType) || APN_TYPE_ALL == userEnteredApnType) {
-        userEnteredApnType = getEditableApnType(readOnlyApnTypes)
-    }
-    Log.d(
-        TAG, "getUserEnteredApnType: changed apn type to editable apn types: "
-            + userEnteredApnType
-    )
-    return userEnteredApnType
-}
-
-private fun getEditableApnType(readOnlyApnTypes: List<String>): String {
-    val editableApnTypes = StringBuilder()
-    var first = true
-    for (apnType in APN_TYPES) {
-        // add APN type if it is not read-only and is not wild-cardable
-        if (!readOnlyApnTypes.contains(apnType)
-            && apnType != APN_TYPE_IA
-            && apnType != APN_TYPE_EMERGENCY
-            && apnType != APN_TYPE_MCX
-            && apnType != APN_TYPE_IMS
-        ) {
-            if (first) {
-                first = false
-            } else {
-                editableApnTypes.append(",")
-            }
-            editableApnTypes.append(apnType)
-        }
-    }
-    return editableApnTypes.toString()
-}
-
 /**
  * Initialize CustomizedConfig information through subId.
  * @param subId subId information obtained from arguments.
@@ -261,6 +211,10 @@
     apnInit: ApnData,
     configManager: CarrierConfigManager
 ): CustomizedConfig {
+    fun log(message: String) {
+        Log.d(TAG, "getCarrierCustomizedConfig: $message")
+    }
+
     val b = configManager.getConfigForSubId(
         apnInit.subId,
         CarrierConfigManager.KEY_READ_ONLY_APN_TYPES_STRING_ARRAY,
@@ -273,72 +227,61 @@
     val customizedConfig = CustomizedConfig(
         readOnlyApnTypes = b.getStringArray(
             CarrierConfigManager.KEY_READ_ONLY_APN_TYPES_STRING_ARRAY
-        )?.toList() ?: emptyList(), readOnlyApnFields = b.getStringArray(
+        )?.toList() ?: emptyList(),
+        readOnlyApnFields = b.getStringArray(
             CarrierConfigManager.KEY_READ_ONLY_APN_FIELDS_STRING_ARRAY
-        )?.toList() ?: emptyList(), defaultApnTypes = b.getStringArray(
+        )?.toList() ?: emptyList(),
+        defaultApnTypes = b.getStringArray(
             CarrierConfigManager.KEY_APN_SETTINGS_DEFAULT_APN_TYPES_STRING_ARRAY
-        )?.toList() ?: emptyList(), defaultApnProtocol = b.getString(
+        )?.toList(),
+        defaultApnProtocol = b.getString(
             CarrierConfigManager.Apn.KEY_SETTINGS_DEFAULT_PROTOCOL_STRING
-        ) ?: "", defaultApnRoamingProtocol = b.getString(
+        ) ?: "",
+        defaultApnRoamingProtocol = b.getString(
             CarrierConfigManager.Apn.KEY_SETTINGS_DEFAULT_ROAMING_PROTOCOL_STRING
-        ) ?: "", isAddApnAllowed = b.getBoolean(CarrierConfigManager.KEY_ALLOW_ADDING_APNS_BOOL)
+        ) ?: "",
+        isAddApnAllowed = b.getBoolean(CarrierConfigManager.KEY_ALLOW_ADDING_APNS_BOOL),
     )
-    if (!ArrayUtils.isEmpty(customizedConfig.readOnlyApnTypes)) {
-        Log.d(
-            TAG,
-            "getCarrierCustomizedConfig: read only APN type: " + customizedConfig.readOnlyApnTypes.joinToString(
-                ", "
-            )
-        )
+    if (customizedConfig.readOnlyApnTypes.isNotEmpty()) {
+        log("read only APN type: " + customizedConfig.readOnlyApnTypes)
     }
-    if (!ArrayUtils.isEmpty(customizedConfig.defaultApnTypes)) {
-        Log.d(
-            TAG,
-            "getCarrierCustomizedConfig: default apn types: " + customizedConfig.defaultApnTypes.joinToString(
-                ", "
-            )
-        )
+    customizedConfig.defaultApnTypes?.takeIf { it.isNotEmpty() }?.let {
+        log("default apn types: $it")
     }
-    if (!TextUtils.isEmpty(customizedConfig.defaultApnProtocol)) {
-        Log.d(
-            TAG,
-            "getCarrierCustomizedConfig: default apn protocol: ${customizedConfig.defaultApnProtocol}"
-        )
+    if (customizedConfig.defaultApnProtocol.isNotEmpty()) {
+        log("default apn protocol: ${customizedConfig.defaultApnProtocol}")
     }
-    if (!TextUtils.isEmpty(customizedConfig.defaultApnRoamingProtocol)) {
-        Log.d(
-            TAG,
-            "getCarrierCustomizedConfig: default apn roaming protocol: ${customizedConfig.defaultApnRoamingProtocol}"
-        )
+    if (customizedConfig.defaultApnRoamingProtocol.isNotEmpty()) {
+        log("default apn roaming protocol: ${customizedConfig.defaultApnRoamingProtocol}")
     }
     if (!customizedConfig.isAddApnAllowed) {
-        Log.d(TAG, "getCarrierCustomizedConfig: not allow to add new APN")
+        log("not allow to add new APN")
     }
     return customizedConfig
 }
 
-fun disableInit(apnDataInit: ApnData): ApnData {
-    var apnData = apnDataInit
-    val isUserEdited = apnDataInit.edited == Telephony.Carriers.USER_EDITED
-    Log.d(TAG, "disableInit: EDITED $isUserEdited")
+private fun ApnData.isReadOnly(): Boolean {
+    Log.d(TAG, "isReadOnly: edited $edited")
+    if (edited == Telephony.Carriers.USER_EDITED) return false
     // if it's not a USER_EDITED apn, check if it's read-only
-    if (!isUserEdited && (apnDataInit.userEditable == 0
-            || apnTypesMatch(apnDataInit.customizedConfig.readOnlyApnTypes, apnDataInit.apnType))
-    ) {
+    return userEditable == 0 ||
+        ApnTypes.isApnTypeReadOnly(apnType, customizedConfig.readOnlyApnTypes)
+}
+
+fun disableInit(apnDataInit: ApnData): ApnData {
+    if (apnDataInit.isReadOnly()) {
         Log.d(TAG, "disableInit: read-only APN")
-        apnData =
-            apnDataInit.copy(customizedConfig = apnDataInit.customizedConfig.copy(readOnlyApn = true))
-        apnData = disableAllFields(apnData)
-    } else if (!ArrayUtils.isEmpty(apnData.customizedConfig.readOnlyApnFields)) {
-        Log.d(
-            TAG,
-            "disableInit: mReadOnlyApnFields ${
-                apnData.customizedConfig.readOnlyApnFields.joinToString(", ")
-            })"
+        val apnData = apnDataInit.copy(
+            customizedConfig = apnDataInit.customizedConfig.copy(readOnlyApn = true)
         )
-        apnData = disableFields(apnData.customizedConfig.readOnlyApnFields, apnData)
+        return disableAllFields(apnData)
     }
-    return apnData
+    val readOnlyApnFields = apnDataInit.customizedConfig.readOnlyApnFields
+    if (readOnlyApnFields.isNotEmpty()) {
+        Log.d(TAG, "disableInit: readOnlyApnFields $readOnlyApnFields)")
+        return disableFields(readOnlyApnFields, apnDataInit)
+    }
+    return apnDataInit
 }
 
 /**
@@ -405,23 +348,6 @@
     return apnData
 }
 
-private fun apnTypesMatch(apnTypeList: List<String>, apnType: String): Boolean {
-    val normalizeApnTypeList = apnTypeList.map(::normalizeApnType)
-    return hasAllApns(normalizeApnTypeList) ||
-        apnType.split(",").map(::normalizeApnType).all { it in normalizeApnTypeList }
-}
-
-fun hasAllApns(apnTypes: List<String>): Boolean {
-    if (APN_TYPE_ALL in apnTypes) {
-        Log.d(TAG, "hasAllApns: true because apnTypes.contains(APN_TYPE_ALL)")
-        return true
-    }
-    return APN_TYPES.all { it in apnTypes }
-}
-
-private fun normalizeApnType(apnType: String): String =
-    apnType.trim().lowercase(Locale.getDefault())
-
 fun deleteApn(uri: Uri, context: Context) {
     val contentResolver = context.contentResolver
     contentResolver.delete(uri, null, null)
@@ -442,24 +368,3 @@
     return if (validEnabled && (apn == "")) context.resources.getString(R.string.error_apn_empty)
     else null
 }
-
-fun validateAPNType(
-    validEnabled: Boolean,
-    apnType: String,
-    readOnlyApnTypes: List<String>,
-    context: Context
-): String? {
-    // if carrier does not allow editing certain apn types, make sure type does not include those
-    if (validEnabled && !ArrayUtils.isEmpty(readOnlyApnTypes)
-        && apnTypesMatch(
-            readOnlyApnTypes,
-            getUserEnteredApnType(apnType, readOnlyApnTypes)
-        )
-    ) {
-        return String.format(
-            context.resources.getString(R.string.error_adding_apn_type),
-            readOnlyApnTypes.joinToString(", ")
-        )
-    }
-    return null
-}
\ No newline at end of file
diff --git a/src/com/android/settings/network/apn/ApnTypeCheckBox.kt b/src/com/android/settings/network/apn/ApnTypeCheckBox.kt
new file mode 100644
index 0000000..4d0659c
--- /dev/null
+++ b/src/com/android/settings/network/apn/ApnTypeCheckBox.kt
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2024 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 com.android.settings.network.apn
+
+import android.telephony.data.ApnSetting
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.remember
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import com.android.settings.R
+import com.android.settings.network.apn.ApnTypes.toApnType
+import com.android.settingslib.spa.widget.editor.SettingsDropdownCheckBox
+
+@Composable
+fun ApnTypeCheckBox(
+    apnData: ApnData,
+    onTypeChanged: (String) -> Unit,
+    onMmsSelectedChanged: (Boolean) -> Unit,
+) {
+    val context = LocalContext.current
+    val apnTypeOptions = remember {
+        ApnTypes.getOptions(context, apnData.apnType, apnData.customizedConfig.readOnlyApnTypes)
+    }
+
+    fun updateMmsSelected() {
+        val apnTypeOptionMms = apnTypeOptions.single { it.text == ApnSetting.TYPE_MMS_STRING }
+        onMmsSelectedChanged(apnTypeOptionMms.selected.value)
+    }
+    LaunchedEffect(Unit) { updateMmsSelected() }
+    SettingsDropdownCheckBox(
+        label = stringResource(R.string.apn_type),
+        options = apnTypeOptions,
+        enabled = apnData.apnTypeEnabled,
+    ) {
+        onTypeChanged(apnTypeOptions.toApnType())
+        updateMmsSelected()
+    }
+}
diff --git a/src/com/android/settings/network/apn/ApnTypes.kt b/src/com/android/settings/network/apn/ApnTypes.kt
index d3dbe38..2c8fa2a 100644
--- a/src/com/android/settings/network/apn/ApnTypes.kt
+++ b/src/com/android/settings/network/apn/ApnTypes.kt
@@ -16,128 +16,112 @@
 
 package com.android.settings.network.apn
 
-import androidx.compose.runtime.mutableStateListOf
-import androidx.compose.runtime.snapshots.SnapshotStateList
+import android.content.Context
+import android.telephony.data.ApnSetting
+import android.util.Log
+import android.widget.Toast
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.ui.text.intl.Locale
+import androidx.compose.ui.text.toLowerCase
+import com.android.settings.R
+import com.android.settingslib.spa.widget.editor.SettingsDropdownCheckOption
 
 object ApnTypes {
-    /**
-     * APN types for data connections.  These are usage categories for an APN
-     * entry.  One APN entry may support multiple APN types, eg, a single APN
-     * may service regular internet traffic ("default") as well as MMS-specific
-     * connections.<br></br>
-     * APN_TYPE_ALL is a special type to indicate that this APN entry can
-     * service all data connections.
-     */
-    const val APN_TYPE_ALL = "*"
+    private const val TAG = "ApnTypes"
 
-    /** APN type for default data traffic  */
-    const val APN_TYPE_DEFAULT = "default"
-
-    /** APN type for MMS traffic  */
-    const val APN_TYPE_MMS = "mms"
-
-    /** APN type for SUPL assisted GPS  */
-    const val APN_TYPE_SUPL = "supl"
-
-    /** APN type for DUN traffic  */
-    const val APN_TYPE_DUN = "dun"
-
-    /** APN type for HiPri traffic  */
-    const val APN_TYPE_HIPRI = "hipri"
-
-    /** APN type for FOTA  */
-    const val APN_TYPE_FOTA = "fota"
-
-    /** APN type for IMS  */
-    const val APN_TYPE_IMS = "ims"
-
-    /** APN type for CBS  */
-    const val APN_TYPE_CBS = "cbs"
-
-    /** APN type for IA Initial Attach APN  */
-    const val APN_TYPE_IA = "ia"
-
-    /** APN type for Emergency PDN. This is not an IA apn, but is used
-     * for access to carrier services in an emergency call situation.  */
-    const val APN_TYPE_EMERGENCY = "emergency"
-
-    /** APN type for Mission Critical Services  */
-    const val APN_TYPE_MCX = "mcx"
-
-    /** APN type for XCAP  */
-    const val APN_TYPE_XCAP = "xcap"
-
-    /** APN type for VSIM  */
-    const val APN_TYPE_VSIM = "vsim"
-
-    /** APN type for BIP  */
-    const val APN_TYPE_BIP = "bip"
-
-    /** APN type for ENTERPRISE  */
-    const val APN_TYPE_ENTERPRISE = "enterprise"
-
-    val APN_TYPES = arrayOf(
-        APN_TYPE_DEFAULT,
-        APN_TYPE_MMS,
-        APN_TYPE_SUPL,
-        APN_TYPE_DUN,
-        APN_TYPE_HIPRI,
-        APN_TYPE_FOTA,
-        APN_TYPE_IMS,
-        APN_TYPE_CBS,
-        APN_TYPE_IA,
-        APN_TYPE_EMERGENCY,
-        APN_TYPE_MCX,
-        APN_TYPE_XCAP,
-        APN_TYPE_VSIM,
-        APN_TYPE_BIP,
-        APN_TYPE_ENTERPRISE
+    private val APN_TYPES = arrayOf(
+        ApnSetting.TYPE_DEFAULT_STRING,
+        ApnSetting.TYPE_MMS_STRING,
+        ApnSetting.TYPE_SUPL_STRING,
+        ApnSetting.TYPE_DUN_STRING,
+        ApnSetting.TYPE_HIPRI_STRING,
+        ApnSetting.TYPE_FOTA_STRING,
+        ApnSetting.TYPE_IMS_STRING,
+        ApnSetting.TYPE_CBS_STRING,
+        ApnSetting.TYPE_IA_STRING,
+        ApnSetting.TYPE_EMERGENCY_STRING,
+        ApnSetting.TYPE_MCX_STRING,
+        ApnSetting.TYPE_XCAP_STRING,
+        ApnSetting.TYPE_VSIM_STRING,
+        ApnSetting.TYPE_BIP_STRING,
+        ApnSetting.TYPE_ENTERPRISE_STRING,
     )
 
-    val APN_TYPES_OPTIONS = listOf(APN_TYPE_ALL) + APN_TYPES
-
-    fun getApnTypeSelectedOptionsState(apnType: String): SnapshotStateList<Int> {
-        val apnTypeSelectedOptionsState = mutableStateListOf<Int>()
-        if (apnType.contains(APN_TYPE_ALL))
-            APN_TYPES_OPTIONS.forEachIndexed { index, _ ->
-                apnTypeSelectedOptionsState.add(index)
-            }
-        else {
-            APN_TYPES_OPTIONS.forEachIndexed { index, type ->
-                if (apnType.contains(type)) {
-                    apnTypeSelectedOptionsState.add(index)
-                }
-            }
-            if (apnTypeSelectedOptionsState.size == APN_TYPES.size)
-                apnTypeSelectedOptionsState.add(APN_TYPES_OPTIONS.indexOf(APN_TYPE_ALL))
+    private fun splitToList(apnType: String): List<String> {
+        val types = apnType.split(',').map { it.trim().toLowerCase(Locale.current) }
+        if (ApnSetting.TYPE_ALL_STRING in types || APN_TYPES.all { it in types }) {
+            return listOf(ApnSetting.TYPE_ALL_STRING)
         }
-        return apnTypeSelectedOptionsState
+        return APN_TYPES.filter { it in types }
     }
 
-    fun updateApnType(
-        apnTypeSelectedOptionsState: SnapshotStateList<Int>,
-        defaultApnTypes: List<String>,
-        readOnlyApnTypes: List<String>
-    ): String {
-        val apnType = apnTypeSelectedOptionsState.joinToString { APN_TYPES_OPTIONS[it] }
-        if (apnType.contains(APN_TYPE_ALL)) return APN_TYPE_ALL
-        return if (apnType == "" && defaultApnTypes.isNotEmpty())
-            getEditableApnType(defaultApnTypes, readOnlyApnTypes)
-        else
-            apnType
+    fun isApnTypeReadOnly(apnType: String, readOnlyTypes: List<String>): Boolean {
+        val apnTypes = splitToList(apnType)
+        return ApnSetting.TYPE_ALL_STRING in readOnlyTypes ||
+            ApnSetting.TYPE_ALL_STRING in apnTypes && readOnlyTypes.isNotEmpty() ||
+            apnTypes.any { it in readOnlyTypes }
     }
 
-    private fun getEditableApnType(
-        defaultApnTypes: List<String>,
-        readOnlyApnTypes: List<String>
-    ): String {
-        return defaultApnTypes.filterNot { apnType ->
-            readOnlyApnTypes.contains(apnType) || apnType in listOf(
-                APN_TYPE_IA,
-                APN_TYPE_EMERGENCY,
-                APN_TYPE_MCX,
-                APN_TYPE_IMS,
+    fun getOptions(context: Context, apnType: String, readOnlyTypes: List<String>) = buildList {
+        val apnTypes = splitToList(apnType)
+        add(
+            context.createSettingsDropdownCheckOption(
+                text = ApnSetting.TYPE_ALL_STRING,
+                isSelectAll = true,
+                changeable = readOnlyTypes.isEmpty(),
+                selected = ApnSetting.TYPE_ALL_STRING in apnTypes,
             )
-        }.joinToString()
+        )
+        for (type in APN_TYPES) {
+            add(
+                context.createSettingsDropdownCheckOption(
+                    text = type,
+                    changeable = ApnSetting.TYPE_ALL_STRING !in readOnlyTypes &&
+                        type !in readOnlyTypes,
+                    selected = ApnSetting.TYPE_ALL_STRING in apnTypes || type in apnTypes,
+                )
+            )
+        }
+    }.also { Log.d(TAG, "APN Type options: $it") }
+
+    private fun Context.createSettingsDropdownCheckOption(
+        text: String,
+        isSelectAll: Boolean = false,
+        changeable: Boolean,
+        selected: Boolean,
+    ) = SettingsDropdownCheckOption(
+        text = text,
+        isSelectAll = isSelectAll,
+        changeable = changeable,
+        selected = mutableStateOf(selected),
+    ) {
+        if (!changeable) {
+            val message = resources.getString(R.string.error_adding_apn_type, text)
+            Toast.makeText(this, message, Toast.LENGTH_SHORT).show()
+        }
     }
-}
\ No newline at end of file
+
+    fun List<SettingsDropdownCheckOption>.toApnType(): String {
+        val (selectAllOptions, regularOptions) = partition { it.isSelectAll }
+        for (selectAllOption in selectAllOptions) {
+            if (selectAllOption.selected.value) return ApnSetting.TYPE_ALL_STRING
+        }
+        return regularOptions.filter { it.selected.value }.joinToString(",") { it.text }
+    }
+
+    private val NotPreSelectedTypes = setOf(
+        ApnSetting.TYPE_IMS_STRING,
+        ApnSetting.TYPE_IA_STRING,
+        ApnSetting.TYPE_EMERGENCY_STRING,
+        ApnSetting.TYPE_MCX_STRING,
+    )
+
+    fun getPreSelectedApnType(customizedConfig: CustomizedConfig): String =
+        (customizedConfig.defaultApnTypes
+            ?: defaultPreSelectedApnTypes(customizedConfig.readOnlyApnTypes))
+            .joinToString(",")
+
+    private fun defaultPreSelectedApnTypes(readOnlyApnTypes: List<String>) =
+        if (ApnSetting.TYPE_ALL_STRING in readOnlyApnTypes) emptyList()
+        else APN_TYPES.filter { it !in readOnlyApnTypes + NotPreSelectedTypes }
+}