Ok; I've read this thread and several others trying to understand all this....obviously I'm a newbe here. I have an AT&T branded w580i that I just got. I ran into problems trying to get Libres eBook reader to work since i need to give it permission to read and write and the phone would not let me do so. After talking to both AT&T and Sony the best they could do was to give me the unlock code. I unlocked the phone but that did not fix it. So it looks like I will have to debrand the thing and this tutoral is a big help. I just have one question: Will unbranding cause problems with my AT&T service? I mean, will I still be able to use the phone like I can now while it is branded? Or will debranding screw up my ability to use my phone service through AT&T. Thanks for an help one can provide.