Apple Iphone Codes

*3001#12345# and tap Call. Enter field mode
Field mode reveals many of the inner settings of your iphone
specially up-to-date network and cell information

*#06# Displays IMEI. No need to tap call
IMEI is the unique identifier for your cell phone hardware
together with your SIM information it identifies you to the
provider network

*777# and tap Call. Account balance for prepaid iPhone

*225# and tap Call. Bill Balance. (Postpaid only)

*646# and tap Call. Check minutes. (Postpaid only)
These three are pretty self explanatory

*#21# and tap call. Setting interrogation for call forwards.
Discover the settings for your call forwarding. You'll see whether
you have voice, data, fax, sms, sync, async, packet access, and
pad access call forwarding enabled or disabled.

*#30# and tap Call. Calling line presentation check.
This displays whether you have enabled or disabled the presentation
of the calling line, presumably the number of the party placing the call.

*&76# and tap Call. Check whether the connected line presentation is enabled or not.
State whether the connected line presentation is enabled or disabled. Presumably similiar to the calling line presentation.

*#43# and tap Call. Determine if call waiting is enabled
Displays call waiting status for voice, data, fax, sms, sync data, async data,
packet access and pad access. Each item is either enabled or disabled.

*#61# and tap Call. Check the number for unanswered calls.
Sho the number for voice call forwarding when a call is answered. Also show
the options for data, fax, sms, sync, async, packet access and pad access

*#62# and tap Call. Check the number for call forwarding if no service is available.
Just like the previous, except for no-service rather than no-answer situations.

*#67# and tap Call. Check the number for call forwarding when the iPhone is busy.
And again, but for when the iPhone is busy.

*#33# and tap Call. Check for call control bars