Apple iPhone 11 Pro Max

iOS 13.0

iOS 18 iOS 17 iOS 16.0 iOS 15.0 iOS 14.0 iOS 13.0

I can't make voice calls on my Apple iPhone 11 Pro Max iOS 13.0

Cause 3 of 3: There's a connection error

If your phone doesn't receive any calls when someone calls you, it may be caused by an unknown connection error.

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.

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