How do i check my sim card number

What do you mean by "I Forget my sim card no"? How can you forget a number you had to use each time you accessed the card?

If you are trying to unlock a phone, we can't help you. Contact your cell carrier and be prepared to provide proof of ownership.

Discussions on how to bypass security measures are not allowed on Tom's Forums.

Question isn't clear, please re-do your question and come back to the forum.