GSM secret codes

These codes are common to any GSM network.
Try them on your own risk, some may not work.
*#06# to get the IEMI of your handset, Keep that number in safe place, you may need it if your mobile was stolen or lost.
*#61# to check your redirection status.
##002# to cancel all redirections.
*43# to activate call waiting, to deactivate #43#.
**43# to enable conference calls. You can make up to 7 calls at once.

If your phone doesn't have incoming and outgoing call barring, you can try this, For outgoing call barring dial *33*barcode*# and pres OK. To deactivate it dial #33#barcode*#.

If you need to block SMS reception (if you are spammed by someone for example) use this code: *35*xxxx*16# where 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 before the number that you are going to call.(*#30# / *#31# or *31# / #31# ).

*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.

**042*pin2 old*newpin2*newpin2* if your SIM card PIN is blocked.