Motorola Flipout MB511 Locked on ATT. Want to use on Tmobile. Created a Motoblur account via wifi. Tried two SIM unlock codes that did not work. I have a Rebel II SIM in it now. Furthest along I got was with firmware 1.3 and mode set to 1. This boots fine, shows no SIM lock, but signal bars are crossed out. Go into settings and have it scan networks. It finds ATT and T-mobile. When I try to connect it tries for a bit, then says that network strength is weak and asks to search again. I have manually entered an APN, but after entering it, it does not show up in the APN lists, which remains blank?? Do I need to have a data plan for a month to get it to register? Other ideas?