First of all....let me start by saying I am completely new to Android. I have no idea what 'root' or 'odin' or 'rom' truly means. My last phone was a Nokia 6650. I recently received an unlocked Behold 2 as a gift from a friend and I am now using it on AT&T. I had a few questions I hope to have answered. Thank you. 1. I notice frequently on the lock screen that the phone is on the T-Mobile network instead of AT&T. Is this considered roaming? Or do I have free reign on whichever network i choose (because the phone is unlocked)? 2. Since I am on AT&T...will I receive an OTA update if/when it comes out? 3. If I can't get the OTA update...Is there a way to update manually without rooting the phone? 4. If I have tech problems, should I call AT&T, T-Mobile or Samsung? 5. Is there a way to access AT&T 3G or just the EDGE network? 6. If I am on the T-Mobile network...will their 3G coverage work? I appreciate any and all answers. If you have any other tips please say them. Thank you.