diff --git a/app/src/main/kotlin/com/tutpro/baresip/MainActivity.kt b/app/src/main/kotlin/com/tutpro/baresip/MainActivity.kt
index 6b909f92..fa414c0f 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/MainActivity.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/MainActivity.kt
@@ -121,8 +121,6 @@ class MainActivity : AppCompatActivity() {
             BaresipService.callActionUri = URLDecoder.decode(intent.data.toString(), "UTF-8")
 
         window.addFlags(WindowManager.LayoutParams.FLAG_IGNORE_CHEEK_PRESSES)
-        if (Utils.darkTheme())
-            window.setBackgroundDrawableResource(R.color.colorDark)
 
         setContentView(binding.root)
 
diff --git a/app/src/main/kotlin/com/tutpro/baresip/Utils.kt b/app/src/main/kotlin/com/tutpro/baresip/Utils.kt
index 85c043ba..1a657b8c 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/Utils.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/Utils.kt
@@ -663,10 +663,6 @@ object Utils {
             BaresipService.activities.add(0, activity)
     }
 
-    fun darkTheme(): Boolean {
-        return AppCompatDelegate.getDefaultNightMode() == AppCompatDelegate.MODE_NIGHT_YES
-    }
-
     @Suppress("DEPRECATION")
     fun setShowWhenLocked(activity: Activity, show: Boolean) {
         when {