Apple iPhone 4S

Press Phone.

Press Keypad.

**21*+61101#

**21*+61101#

Key in **21*+61101# and press the call icon.

**61*+61101*20#

**61*+61101*20#

Key in **61*+61101*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.

**62*+61101#

**62*+61101#

Key in **62*+61101# and press the call icon.

**67*+61101#

**67*+61101#

Key in **67*+61101# and press the call icon.

Press the Home key to return to the home screen.