Ok my G1 was working perfectly. I rooted it and then tried to unroot it, and when I did I put like the necessary files to do it and then then the sign in to gmail account showed up like when you first get the phone. So I attempted to unlock it but I keep getting the error saying I dont have data, but I do (100% sure) - Im in the US so I use the Tmobile USA APN - I tried to unlock it with an att sim choosing the Att apn but nothing (it worked before when I first got the phone and it was rooted) - So I tried my friends Tmobile sim who also has a data plan and still the same error - I even did a fatory reset (Alt w) and tried again and still same thing - the phone is still rooted, any suggestions? please help. thanks. - I think the files that I put to unroot might have messed this up. should i use another phone and put the right files on the micro sd card and try it on g1. Anyone know the right files that I would need.