So I am able to downgrade to 1.1.1 and i get service for a little bit but as soon as it begins to sync I get no service. Am I doing something wrong or do I just need to not sync after i restore.

Thats the guide that I followed and it works awesome but just when I sync it gives me no service indicator. Then I update back to 1.1.2 so it will work. Does anyone have any suggestions? Do I need to install appsnap before i restore or do i need to install specific utilities to keep it from doing that? I also want to unlock it so I can use the phone with another sim card so any help would be greatly appreciated!!!