I hack stuff alot, rooted my android and before I homebrewed my palmp pre. I understand the jailbreak and then keeping up with the new versions etc, BUT I am on sprint and not moving for a while. So I being xmas coming up and having spare cash in the pocket now, thought about hitting the good old craigslist and buying a 3G or 3GS iphone, some 3Gs are cheap and in perfect condition. When I get it from somebody and they take their sim card out it will still work sans the att network right on wifi? After Jailbreak IF I wanted to go to att, best thing to do would be restore iphone to full normal os? IF I try tmobile, just pop the sim in after jailbreak? On skype and now the google voice app, on a full iphone does the calls actually go through the ear piece and such like the full phone? Thanks.