I have an iphone 4s that was originally purchased from SaskTel (canadian cell provider). It is on ios 5.0.1 and baseband 4.11.08. I am in the US and want to use h2o wireless, but have gotten many different answers from everyone I talk to (including h2o staff). I noticed a network carrier option in the 4s menu allowing me to choose from automatic or manual. When I press manual, eventually I see options for AT&T or T-Mobile...which makes me wonder what that means... Any info will be appreciated. Thanks in advance.