To reset the phone lock on the Samsung Galaxy s2 go to the settings section and select password options. then select password reset and enter your current password followed the password you would like to change it to.
You will have to reset your username and password in your settings.
reset password
reset code
No, even if you factory reset the Galaxy S4 it will not downgrade.
Go onto the website or samsung dealer
master password yes
To reset your Galaxy S3, you simply need to: Launch settings, Open "Backup and reset," and tap "Factory data reset" to reset your galaxy s3 to its original factory settings.
One can reset the password on a Samsung GT-C3053 easily if they know the original pass code to be able to change it. If one does not know the original passcode the phone will have to have a hard reset performed.
0000
click on 'reset password' & follow the instructions
go to settings , then security , and it is in that list