Forgoton my password on my blackberry curve 820

To Unlock the Blackberry From the Password lock You can use the Security Unlock code,You can get that Code at
http://www.theunlockarena.com/blackberry-new-2010-security-unlocking-service/rs13wp10/ and Unlock it.

You can use your PUK code to unlock blackberry curve password, just type any password until your phone asking you to enter puk code. PUK code can you found from your sim card bundle if you don't have it just call your service provider, they will give it to you. After you put that puk code your blackberry unlocked from old password.