I'll keep it brief since these seem to be slight variations of already asked questions. 1) I have an AT&T iPhone 3GS sim card with voice and unlimited data. I want to put this in an S7. How will this work out? Any "homebrews" around it? 2) How do you tell the difference between which model is advertised and what you'll actually get? I've seen every combination of pieces from the different skews listed. 3) Which models actually have capacitive touch screens? This seems to be the biggest deal. Thanks a lot!