Samsung GT-E1200Y Keypad mobile , B313E , B312E , B310E , Sim/Phone Lock , Lock 100% Fixed Solution
Samsung GT-E1200Y Keypad mobile , B313E , B312E , B310E , Sim/Phone Lock , Sim Lock Reset , Lock 100% Fixed Solution
Use PC to reset or update the version.
Last option is to use PC .
Don't trust on fake videos like SOS call type of.