How do i unblock my sim?

I have got an O2 sim and it's blocked because i changed my pin code and then forgot it but it's not registered so i can't go on the 02 webside to get my PUK code but when i switch it on there is an option 2 where i can unblock it and then it asks for the PIN1 Unblock Code


does any 1 know how to unblock please help I would very much appreciate it


thank you

How do i unblock my sim?
Pop up to the O2 shop and ask there. It will be the best option
Reply:http://www.o2.co.uk/puk/landing
Reply:if you enter your mobile number on this page O2 will send you the PUK:





http://www.o2.co.uk/apps/getPUK/welcome
Reply:If you still have all the literature for your phone/sim card, it should have the PIN1 unblock code in here, it's usually a default. The only other option is to phone up customer services at O2, and see whether they can give you the PUK code. Other wise it will probably be a case of buying a new sim card....