How to delete an old account on an iphone 4, its got the guys email on it?

Every time i go to download an app it asks for the old owners password, i just bought it and now i'm kinda stuck. Do i reset it? And if so will it mess up the factory unlock on the phone?

This would be best answered by someone where it was purchased… You can also contact the manufacturer of the phone… Probably the best bet is to contact your service provider by phone or stop by one of their stores… Their reps can answer all of the questions… Good luck