diff --git a/mobile/src/main/scala/com/github/shadowsocks/ShadowsocksApplication.scala b/mobile/src/main/scala/com/github/shadowsocks/ShadowsocksApplication.scala
index 1f147de7..1a55cf78 100644
--- a/mobile/src/main/scala/com/github/shadowsocks/ShadowsocksApplication.scala
+++ b/mobile/src/main/scala/com/github/shadowsocks/ShadowsocksApplication.scala
@@ -160,12 +160,10 @@ class ShadowsocksApplication extends Application {
 
     if (dataStore.getLong(Key.assetUpdateTime, -1) != info.lastUpdateTime) copyAssets()
     // hopefully hashCode = mHandle doesn't change, currently this is true from KitKat to Nougat
-    if (!(1025 to 65535 contains dataStore.portProxy))
-      dataStore.putInt(Key.portProxy, 1080 + Binder.getCallingUserHandle.hashCode)
-    if (!(1025 to 65535 contains dataStore.portLocalDns))
-      dataStore.putInt(Key.portLocalDns, 5400 + Binder.getCallingUserHandle.hashCode)
-    if (!(1025 to 65535 contains dataStore.portTransproxy))
-      dataStore.putInt(Key.portTransproxy, 8200 + Binder.getCallingUserHandle.hashCode)
+    lazy val userIndex = Binder.getCallingUserHandle.hashCode
+    if (!(1025 to 65535 contains dataStore.portProxy)) dataStore.putInt(Key.portProxy, 1080 + userIndex)
+    if (!(1025 to 65535 contains dataStore.portLocalDns)) dataStore.putInt(Key.portLocalDns, 5450 + userIndex)
+    if (!(1025 to 65535 contains dataStore.portTransproxy)) dataStore.putInt(Key.portTransproxy, 8200 + userIndex)
 
     if (Build.VERSION.SDK_INT >= 26) {
       val nm = getSystemService(classOf[NotificationManager])
diff --git a/mobile/src/main/scala/com/github/shadowsocks/database/Profile.scala b/mobile/src/main/scala/com/github/shadowsocks/database/Profile.scala
index 33d15c07..38b0741d 100644
--- a/mobile/src/main/scala/com/github/shadowsocks/database/Profile.scala
+++ b/mobile/src/main/scala/com/github/shadowsocks/database/Profile.scala
@@ -23,7 +23,6 @@ package com.github.shadowsocks.database
 import java.util.Locale
 
 import android.net.Uri
-import android.os.Binder
 import android.util.Base64
 import com.github.shadowsocks.plugin.PluginConfiguration
 import com.github.shadowsocks.preference.OrmLitePreferenceDataStore