Apple iPhone 13 Pro Max

Apple iPhone 13 Pro Max

iOS 15.0

iOS 16.0 iOS 15.0

I can't make voice calls on my Apple iPhone 13 Pro Max iOS 15.0

Cause 2 of 3: Missed calls are diverted too fast

Your missed calls are diverted after a specified number of seconds. If your calls are diverted too fast, you need to select a longer period of time.

Solution: Set divert delay.

Step 1 of 8

Find "Keypad"

Press the phone icon.

Step 2 of 8

Find "Keypad"

Press Keypad.

**21*(prefix) 5 (your phone number)#

**21*(prefix) 5 (your phone number)#

**21*(prefix) 5 (your phone number)#

Step 3 of 8

Divert all calls

Key in **21*(prefix) 5 (your phone number)# and press the call icon.

**61*(prefix) 5 (your phone number)*20#

**61*(prefix) 5 (your phone number)*20#

**61*(prefix) 5 (your phone number)*20#

Step 4 of 8

Divert missed calls

Key in **61*(prefix) 5 (your phone number)*20# and press the call icon.

**62*(prefix) 5 (your phone number)#

**62*(prefix) 5 (your phone number)#

**62*(prefix) 5 (your phone number)#

Step 5 of 8

Divert if unavailable

Key in **62*(prefix) 5 (your phone number)# and press the call icon.

**67*(prefix) 5 (your phone number)#

**67*(prefix) 5 (your phone number)#

**67*(prefix) 5 (your phone number)#

Step 6 of 8

Divert if busy

Key in **67*(prefix) 5 (your phone number)# and press the call icon.

Step 7 of 8

End call

Press Dismiss.

Step 8 of 8

Return to the home screen

Slide your finger upwards starting from the bottom of the screen to return to the home screen.

1 Find "Keypad"

Press the phone icon.

Press Keypad.

2 Divert all calls

Key in **21*(prefix) 5 (your phone number)# and press the call icon.

**21*(prefix) 5 (your phone number)#

3 Divert missed calls

Key in **61*(prefix) 5 (your phone number)*20# and press the call icon.

Key in the required number of seconds before the call is diverted, e.g. 20. The number needs to be divisible by 5.

**61*(prefix) 5 (your phone number)*20#

4 Divert if unavailable

Key in **62*(prefix) 5 (your phone number)# and press the call icon.

**62*(prefix) 5 (your phone number)#

5 Divert if busy

Key in **67*(prefix) 5 (your phone number)# and press the call icon.

**67*(prefix) 5 (your phone number)#

6 End call

Press Dismiss.

7 Return to the home screen

Slide your finger upwards starting from the bottom of the screen to return to the home screen.

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