I have a D2G that I did the GSM hack for ATT about 6 months ago. It has been working ok for a while. About 1 month ago while I was in canada it stopped working. I had to take my work's sim card out and put it back in the work Iphone. I forwarded all my calls for a few more weeks and couldn't stand it anymore and put the sim card back in and it worked just fine.
I went to canada 4 weeks ago with no problems and went back again 2 weeks ago and came back with the same problem. When I put the sim card in it shows no network. I try to manually seach for networks and it can't find anything. I try to choose from the list and it can't find any.
Do you think it is an ATT thing? Verizon thing? or a hardware or software problem?