Has anyone else figured this one out? The problem is when you're on wifi then turn off phone for a while when you turn back mail or safari again, you will not be on wifi you have to reassign which wifi network to join. Whereas 2.2.1 this never happened. (I actually first experienced this with my 2g phone, then put my 3g on 3.0 and it continued to happen) I was recommended to turn off bluetooth as a simple temp fix but even this didnt cut it... anyone try anything else? And is 3.1 basically the assumed answer to this? Im hoping apple doesnt mess with basebands on this update since many iphones are unlocked.