diff --git a/app/src/main/java/dev/bluehouse/enablevolte/Components.kt b/app/src/main/java/dev/bluehouse/enablevolte/Components.kt
index e2c086e..b179c7d 100644
--- a/app/src/main/java/dev/bluehouse/enablevolte/Components.kt
+++ b/app/src/main/java/dev/bluehouse/enablevolte/Components.kt
@@ -166,18 +166,18 @@ fun UserAgentPropertyView(label: String, value: String?, onUpdate: ((String) ->
                         Row(modifier = Modifier.align(Alignment.End)) {
                             TextButton(
                                 onClick = {
-                                    onUpdate(typedText)
                                     openTextEditDialog = false
                                 },
                             ) {
-                                Text(stringResource(R.string.confirm))
+                                Text(stringResource(R.string.dismiss))
                             }
                             TextButton(
                                 onClick = {
+                                    onUpdate(typedText)
                                     openTextEditDialog = false
                                 },
                             ) {
-                                Text(stringResource(R.string.dismiss))
+                                Text(stringResource(R.string.confirm))
                             }
                         }
                     }
diff --git a/app/src/main/java/dev/bluehouse/enablevolte/Moder.kt b/app/src/main/java/dev/bluehouse/enablevolte/Moder.kt
index 931407a..b21971f 100644
--- a/app/src/main/java/dev/bluehouse/enablevolte/Moder.kt
+++ b/app/src/main/java/dev/bluehouse/enablevolte/Moder.kt
@@ -241,13 +241,19 @@ class SubscriptionModer(val subscriptionId: Int) : Moder() {
     val isVoLteConfigEnabled: Boolean
         get() = this.getBooleanValue(CarrierConfigManager.KEY_CARRIER_VOLTE_AVAILABLE_BOOL)
 
-    val isVonrConfigEnabled: Boolean
+    val isVoNrConfigEnabled: Boolean
         get() = this.getBooleanValue(CarrierConfigManager.KEY_VONR_ENABLED_BOOL) &&
             this.getBooleanValue(CarrierConfigManager.KEY_VONR_SETTING_VISIBILITY_BOOL)
 
-    val isCrosssimConfigEnabled: Boolean
-        get() = this.getBooleanValue(CarrierConfigManager.KEY_CARRIER_CROSS_SIM_IMS_AVAILABLE_BOOL) &&
-            this.getBooleanValue(CarrierConfigManager.KEY_ENABLE_CROSS_SIM_CALLING_ON_OPPORTUNISTIC_DATA_BOOL)
+    val isCrossSIMConfigEnabled: Boolean
+        get() {
+            return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+                this.getBooleanValue(CarrierConfigManager.KEY_CARRIER_CROSS_SIM_IMS_AVAILABLE_BOOL) &&
+                    this.getBooleanValue(CarrierConfigManager.KEY_ENABLE_CROSS_SIM_CALLING_ON_OPPORTUNISTIC_DATA_BOOL)
+            } else {
+                false
+            }
+        }
 
     val isVoWifiConfigEnabled: Boolean
         get() = this.getBooleanValue(CarrierConfigManager.KEY_CARRIER_WFC_IMS_AVAILABLE_BOOL)
@@ -255,9 +261,12 @@ class SubscriptionModer(val subscriptionId: Int) : Moder() {
     val isVoWifiWhileRoamingEnabled: Boolean
         get() = this.getBooleanValue(CarrierConfigManager.KEY_CARRIER_DEFAULT_WFC_IMS_ROAMING_ENABLED_BOOL)
 
-    val showIMSinSIMinfo: Boolean
+    val showIMSinSIMInfo: Boolean
         get() = this.getBooleanValue(CarrierConfigManager.KEY_SHOW_IMS_REGISTRATION_STATUS_BOOL)
 
+    val allowAddingAPNs: Boolean
+        get() = this.getBooleanValue(CarrierConfigManager.KEY_ALLOW_ADDING_APNS_BOOL)
+
     val showVoWifiMode: Boolean
         get() = this.getBooleanValue(CarrierConfigManager.KEY_EDITABLE_WFC_MODE_BOOL)
 
diff --git a/app/src/main/java/dev/bluehouse/enablevolte/pages/Config.kt b/app/src/main/java/dev/bluehouse/enablevolte/pages/Config.kt
index 86f9cdb..a8b8106 100644
--- a/app/src/main/java/dev/bluehouse/enablevolte/pages/Config.kt
+++ b/app/src/main/java/dev/bluehouse/enablevolte/pages/Config.kt
@@ -1,5 +1,6 @@
 package dev.bluehouse.enablevolte.pages
 
+import android.os.Build
 import android.telephony.CarrierConfigManager
 import android.widget.Toast
 import androidx.compose.foundation.layout.Column
@@ -29,7 +30,6 @@ import dev.bluehouse.enablevolte.UserAgentPropertyView
 import dev.bluehouse.enablevolte.ValueType
 import dev.bluehouse.enablevolte.checkShizukuPermission
 import java.lang.IllegalStateException
-import java.util.*
 
 @Composable
 fun Config(navController: NavController, subId: Int) {
@@ -41,10 +41,11 @@ fun Config(navController: NavController, subId: Int) {
     var configurable by rememberSaveable { mutableStateOf(false) }
     var voLTEEnabled by rememberSaveable { mutableStateOf(false) }
     var voNREnabled by rememberSaveable { mutableStateOf(false) }
-    var crosssimEnabled by rememberSaveable { mutableStateOf(false) }
+    var crossSIMEnabled by rememberSaveable { mutableStateOf(false) }
     var voWiFiEnabled by rememberSaveable { mutableStateOf(false) }
     var voWiFiEnabledWhileRoaming by rememberSaveable { mutableStateOf(false) }
-    var showIMSinSIMinfo by rememberSaveable { mutableStateOf(false) }
+    var showIMSinSIMInfo by rememberSaveable { mutableStateOf(false) }
+    var allowAddingAPNs by rememberSaveable { mutableStateOf(false) }
     var showVoWifiMode by rememberSaveable { mutableStateOf(false) }
     var showVoWifiRoamingMode by rememberSaveable { mutableStateOf(false) }
     var showVoWifiInNetworkName by rememberSaveable { mutableStateOf(false) }
@@ -61,11 +62,12 @@ fun Config(navController: NavController, subId: Int) {
 
     fun loadFlags() {
         voLTEEnabled = moder.isVoLteConfigEnabled
-        voNREnabled = moder.isVonrConfigEnabled
-        crosssimEnabled = moder.isCrosssimConfigEnabled
+        voNREnabled = moder.isVoNrConfigEnabled
+        crossSIMEnabled = moder.isCrossSIMConfigEnabled
         voWiFiEnabled = moder.isVoWifiConfigEnabled
         voWiFiEnabledWhileRoaming = moder.isVoWifiWhileRoamingEnabled
-        showIMSinSIMinfo = moder.showIMSinSIMinfo
+        showIMSinSIMInfo = moder.showIMSinSIMInfo
+        allowAddingAPNs = moder.allowAddingAPNs
         showVoWifiMode = moder.showVoWifiMode
         showVoWifiRoamingMode = moder.showVoWifiRoamingMode
         showVoWifiInNetworkName = (moder.showVoWifiInNetworkName == 1)
@@ -129,16 +131,18 @@ fun Config(navController: NavController, subId: Int) {
                 true
             }
         }
-        BooleanPropertyView(label = stringResource(R.string.enable_crosssim), toggled = crosssimEnabled) {
-            crosssimEnabled = if (crosssimEnabled) {
-                moder.updateCarrierConfig(CarrierConfigManager.KEY_CARRIER_CROSS_SIM_IMS_AVAILABLE_BOOL, false)
-                moder.updateCarrierConfig(CarrierConfigManager.KEY_ENABLE_CROSS_SIM_CALLING_ON_OPPORTUNISTIC_DATA_BOOL, false)
-                false
-            } else {
-                moder.updateCarrierConfig(CarrierConfigManager.KEY_CARRIER_CROSS_SIM_IMS_AVAILABLE_BOOL, true)
-                moder.updateCarrierConfig(CarrierConfigManager.KEY_ENABLE_CROSS_SIM_CALLING_ON_OPPORTUNISTIC_DATA_BOOL, true)
-                moder.restartIMSRegistration()
-                true
+        BooleanPropertyView(label = stringResource(R.string.enable_crosssim), toggled = crossSIMEnabled, enabled = Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+                crossSIMEnabled = if (crossSIMEnabled) {
+                    moder.updateCarrierConfig(CarrierConfigManager.KEY_CARRIER_CROSS_SIM_IMS_AVAILABLE_BOOL, false)
+                    moder.updateCarrierConfig(CarrierConfigManager.KEY_ENABLE_CROSS_SIM_CALLING_ON_OPPORTUNISTIC_DATA_BOOL, false)
+                    false
+                } else {
+                    moder.updateCarrierConfig(CarrierConfigManager.KEY_CARRIER_CROSS_SIM_IMS_AVAILABLE_BOOL, true)
+                    moder.updateCarrierConfig(CarrierConfigManager.KEY_ENABLE_CROSS_SIM_CALLING_ON_OPPORTUNISTIC_DATA_BOOL, true)
+                    moder.restartIMSRegistration()
+                    true
+                }
             }
         }
         BooleanPropertyView(label = stringResource(R.string.enable_vowifi), toggled = voWiFiEnabled) {
@@ -184,6 +188,15 @@ fun Config(navController: NavController, subId: Int) {
                 true
             }
         }
+        BooleanPropertyView(label = stringResource(R.string.allow_adding_apns), toggled = allowAddingAPNs) {
+            allowAddingAPNs = if (allowAddingAPNs) {
+                moder.updateCarrierConfig(CarrierConfigManager.KEY_ALLOW_ADDING_APNS_BOOL, false)
+                false
+            } else {
+                moder.updateCarrierConfig(CarrierConfigManager.KEY_ALLOW_ADDING_APNS_BOOL, true)
+                true
+            }
+        }
 
         HeaderText(text = stringResource(R.string.string_values))
         UserAgentPropertyView(label = stringResource(R.string.user_agent), value = configuredUserAgent) {
@@ -288,8 +301,8 @@ fun Config(navController: NavController, subId: Int) {
                 true
             }
         }
-        BooleanPropertyView(label = stringResource(R.string.show_ims_status_in_sim_status), toggled = showIMSinSIMinfo) {
-            showIMSinSIMinfo = if (showIMSinSIMinfo) {
+        BooleanPropertyView(label = stringResource(R.string.show_ims_status_in_sim_status), toggled = showIMSinSIMInfo) {
+            showIMSinSIMInfo = if (showIMSinSIMInfo) {
                 moder.updateCarrierConfig(CarrierConfigManager.KEY_SHOW_IMS_REGISTRATION_STATUS_BOOL, false)
                 false
             } else {
diff --git a/app/src/main/res/values-zh-rCN/strings.xml b/app/src/main/res/values-zh-rCN/strings.xml
index 5c72d9b..8099a47 100644
--- a/app/src/main/res/values-zh-rCN/strings.xml
+++ b/app/src/main/res/values-zh-rCN/strings.xml
@@ -21,6 +21,7 @@
     <string name="show_vowifi_roaming_preference_in_settings">显示 VoWiFi漫游 选项</string>
     <string name="add_wifi_calling_to_network_name">网络名中添加 \"Wi-Fi Calling\"</string>
     <string name="show_ims_status_in_sim_status">在 SIM 信息中显示 IMS 状态</string>
+    <string name="allow_adding_apns">Allow adding APNs</string>
     <string name="show_wifi_only_for_vowifi">VoWiFi 显示 \"仅WiFi\" 模式</string>
     <string name="enable_video_calling_vt">启用视频通话(VT)</string>
     <string name="enable_ss_over_ut">UT接口下启用补充业务</string>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index ceef38f..f044591 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -22,6 +22,7 @@
     <string name="add_wifi_calling_to_network_name">Add \"Wi-Fi Calling\" to Network Name</string>
     <string name="show_wifi_only_for_vowifi">Show \"WiFi only\" mode for VoWiFi</string>
     <string name="enable_video_calling_vt">Enable Video Calling (VT)</string>
+    <string name="allow_adding_apns">Allow adding APNs</string>
     <string name="enable_ss_over_ut">Enable Supplementary Services over UT</string>
     <string name="enable_ss_over_cdma">Enable Supplementary Services over CDMA</string>
     <string name="sim_detected">SIM Detected</string>