GSM code information

GSM information

Here's a sample of some of the codes you can try.

*#06# - Displays your International Mobile Equipment Identity (or IMEI for short). The IMEI number is used by the GSM network to identify valid devices and therefore can be used to stop a stolen phone from accessing the network.

*#21# and press Call. Settings for call forwarding for calls, data, fax and sms.

*#30# and press Call. Calling line presentation check.

*31# (followed by the number you are dialing) - Sets outgoing "Caller ID" to be private.

#31# (followed by the number you are dialing) - Sets outgoing "Caller ID" to be visible.

*#31# (followed by the number you are dialing) - Displays current setting of outgoing "Caller ID". (Disabled = visible, Enabled = private).

*#33# and press Call. Check for call all barring.

*#43# and press Call. Determine if call waiting is enabled.

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

*#76# and press Call. Check whether the connected line presentation is enabled or not.

*225# and press Call. Bill balance for postpaid accounts only.

*646# and press Call. Check the minutes for a postpaid account only.

*777# and press Call. Check the account balance for a prepaid

they might be for specific operators only.. not for all..
coz every operator have different numbers for checking balance and all that..

ya for Bill balance (last three) it may be different