Hey guys, I just bought an Iphone 3gs off of Craigslist and jailbroke it with redsn0w 0.9.15b1. I put my T Mobile sim card in and it keeps saying either "No Service" or "Searching...". I've been trying all sorts of tricks that I found on youtube, other forums, etc. but none of them have worked so far. I didnt think it was unlocked but I did a network check online and they said that it was already unlocked. Do I take it in to T Mobile and ask them whats up? Here's some more info about my phone: It has iOS 6.1.3 and the baseband is 6.15.00. It was made in the 38th week of 2009. Thanks guys!