Unlocked G1 and initial gmail account

[cacrus]

Hi ,

I just bought an unlocked Google G1 phone outside US . However I can not access Gmail or market place as it has some email account already configured and i am not sure whats the password. I have googled to find out how to reset this account and use my own gmail account .

Some threads suggest that resetting to factory defaults with proper local APN setting will do that , but since this is an unlocked Phone , my concern is that would it affect the phone if i do a factory reset ?

Is there a way to find out how the phone was unlocked ? proper TMobile code or jail broken ?

Does Factory reset helps in resetting the initial gmail account ?


Please help .

Thanks