Blackberry 8520 password unlocking is very simple and we can reset user password just in few minutes. The trick i want to share with you is very easy and tested many 8520 blackberry mobiles.
How To Remove Password On Blackberry 8520 Without Software
Turn on your blackberry 8520 mobile, when mobile ask for password enter any password or enter blackberry 10 to 11 times after last entry mobile shows on screen enter your new password. Enter new password and press ok to reboot mobile. After restart apply basic settings like time and date etc.
Now your mobile reset to factory default settings and all your data, installed apps and messages will be deleted. If you want to safe your data then take backup before unlock user password.