I can't make voice calls on my Apple iPhone 8 iOS 15.2

Cause 1 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.

Solution: Restart your phone.

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 On/Off until your phone restarts.

1 Restart your phone

Press the Top volume key.
Press the Bottom volume key.
Press and hold On/Off until your phone restarts.

Did this solve the problem?

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