Shit happens, or any virus has attacked your mobile, its inevitable u do something wrong, Now what to do you simply have to format your phone. To format the phone, press *#7370#, then enter the lock code, which is the sec code of the phone. NOTE: battery must be filled, else if format is disrupted by low battery, consequences will be disastrous
I heard the code *#7780# works too, pretty much the same i think. For 6600 users, to format the fone, there's an alternative way. Press and hold <3>, <*>, and the buttons, then power on fone, keep holding on the 3 buttons, till u come to a format screen. tis method ONLY works on 6600, and need not enter the sec code. BUT sec code wun be reset to default 12345..