Apple iPhone 4

Find "Keypad"

Press Phone.

Find "Keypad"

Press Keypad.

Choose option

Choose one of the following options:
Divert all calls, go to 2a.
Divert missed calls, go to 2b.
Divert if unavailable, go to 2c.
Divert if busy, go to 2d.

2a - Divert all calls

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

2b - Divert missed calls

To select for how long you want your phone to ring before the call is diverted:
Key in **61*(prefix) 5 (your phone number)**the required number of seconds#
E.g.:
**61*(prefix) 5 (your phone number)**5#

2c - Divert if unavailable

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

2d - Divert if busy

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

Send request

Press Call.
A request to turn on the setting is sent to the network.

Send request

Press Dismiss.