There are several other secrets codes which could come in handy from times to times.

Type *#06# to display your IMEI. The IMEI is your phones unique identification number. IMEI will be important if your phone is stolen. Then you can contact your mobile operator with the IMEI and ask them to block the phone.

Call *777# for your account balance on a prepaid phone.

*225# for your bill palance (post paid only) or *646# to check your minutes.

If these functions are available always depends on your network. If not there will appear a UNKNOWN APPLICATION.