Apple iPhone 12

iOS 15.0

I can't make voice calls on my Apple iPhone 12 iOS 15.0

Cause 6 of 9: Your phone is overloaded for unknown reasons

If your phone is overloaded, you can't make any calls. It may help restarting it.

Step 1 of 3

Restart your phone

Press the Top volume key.

Step 2 of 3

Restart your phone

Press the Bottom volume key.

Step 3 of 3

Restart your phone

Press and hold the Side button until your phone restarts.

Press the Top volume key.

Press the Bottom volume key.

Press and hold the Side button until your phone restarts.