GSM Secret Codes

On Tesco mobile if you dial the top up line get to the menu where it ask you for topping up by payment or voucher stay on the line and it will give you the option of calling customer care for FREE also try other O2 codes for Tesco mobile they work.

To check minutes on the Cingular network call *646# and you will recieve a FREE txt message with the remaining minutes. To check balance dial al *225# then send and you will recieve a FREE txt message with the current balance but doesn't work with combined billing.

To access ur voicemail on Telstra via another phone, call ur mobile and when you hear your greeting press * then enter your voicemail pin and press #. You will now be told if u have any messages!

To get you account balance on BSNL Mobile in India press *123# and then press call.

If you are in Indiausing IDEA Pre or Postpaid connection then dial *101# you will get a secret menu that will let you to activate or deactivate any supported Idea package for your mobile.

On wind (Italy), type *123# to see credit balance.

If you call *121# on Mobtel network, you'll ger your credit balance.

To check your credit balance on Beeline call *102#

To view your balance on Dialog GSM for pre-paid only type *#456# and press call.

You can see credit balance at display by dialing *444# for Telenor Pakistan. *111# on Mobilink Pakistan. and *100# on Warid Pakistan.

Hutch GSM: To see your credit balance on the screen, Call *141# .

To view balance on Maxis type *#122#

GSM Secret Codes

Type *#61# and press call - Check redirection status.
Cancel all redirections: ##002#
*43# to activate call waiting, to deactivate #43#.
If your phone doesn't have incoming call barring and outgoing call barring, you can try this.

For outgoing call barring dial *33*barcode*# and pres OK. To deactivate it dial #33#barcode*#.

On any phone on any network type in **43# to enable conference calls. You can make up to 7 calls at once

If you need to block SMS reception (if you are spammed by someone) just press this code:
*35*xxxx*16#
xxxx is your Call Barring code (default is 0000).
To remove this barring type:
#35*xxxx#

If you want to hide/show your phone number when calling, put one of these codes below in front of the number that you are going to call.
(*#30# / *#31# or *31# / #31# ) Works on some networks.

Typing *0# or *nm# on the beginning of a txt message gives you detailed delivery report on some networks.. But turn off reports in message settings before.

When the sim card-pin blocked type **042*pin2 old*newpin2*newpin2*