It will display your iPhone IMEI. It is an identifier for your mobile phone hardware.

This code opens your field mode which contains all of iPhone personal settings, cell information, and newest network.

You can check the number to call forward when the iPhone is busy. And again, but for when the iPhone is busy.

It will display your available minutes.

To check the Bill Balance.

To check the Account balance use this code for prepaid iPhone only.

You can check call control bars by using this code. Also for seeing whether barring is enabled or disabled for outgoing you can check all the usual suspects like fax, SMS, voice, information, etc.

For checking connected line presentation is enabled or not you can use this code. You can also check whether the connected line presentation is enabled or disabled.

You can set an inquiry for call forwards. Find the settings for your call forwarding. You will see whether you have the fax, SMS, voice, knowledge, sync, async, paid access & packet access call forwarding enabled or disabled.

It will let you know about the use of information info.

To check the numbers of missed calls.

You can verify the number for forwarding calls If there is no service is available.

EFR mode Enhanced Full Rate improves your iPhone voice quality, but it will slightly reduce battery life.

To check the SMS center.

Barring code # Outgoing calls abroad to block the lock code to inquire about her please contact your network operator.