I just wanna share here a tricks that I have learn in a forum on showing your sim card number. This is for those people who forgot their own number or have lost their Sim Pack. This trick won’t deduct any amount of load on your mobile phones.Tested on Nokia Phones but you can also try this on other phones if it will works. Just follow this steps:
1.) Dial 99
2.) Call or the Green Button
3.) It will be processing your request.
4.) Number Shown
credits to: raine27 of Pinoyden