Will Updating My Unlocked iPhone4 re-lock it?
It is unlocked by AT&T. I now use T-Mobile, baseband is 04.12.01 and version is 5.1
I'm nervous about updating it because I need it to remain unlocked. I didn't want to presume that because AT&T unlocked it, that it will remain unlocked through the update. Can anyone confirm that I can update?
(Side question: I am supposed to have tethering from T-Mobile, but I don't think this a compatible feature that I can access on my iPhone 4 with T-Mobile, right?)
iPhone 4