I just bought a 2g iphone wich jailbreak and unlock and has 3.0. When I try to update some of the applications it keeps coming up with the previous owner e-mail and wants his password. I have a account with Itunes and Application store. I put my information in the phone. I don't see anywhere where is information is. How do I remove his. Or do I just need to uninstall the application and reinstall them.