Device Guides
Apple iPhone 4
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iOS is the operating system software installed on your iPhone. To find out which version you have: Tap Settings, Tap General, Tap About, and view the version number.

Search in Apple iPhone 4
How to
Diverting calls to my voicemail
You can divert incoming calls to your voicemail. You can choose which types of calls you want to divert, such as all calls, missed calls or when the mobile phone is busy.
Tap Phone.
Tap Keypad.


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.


Key in **21*321#


To select how long you want your mobile phone to ring before the call is diverted:
Key in **61*321**the required number of seconds#
Eg.:
Key in *61*321**5#


Key in**62*321#


Key in**67*321#
Tap Call.
A request to turn on the setting is sent to the network.
Tap Dismiss.