I read the first few pages of the thread and the last few but couldn't find any comments about: do we need to be on T-Mobiles network to enjoy this new freedom? I just landed in the UK today and from my current location I can see: O2, Vodaphone, EE, 3 and I occasionally see t-mobile...so will I get nailed (with roaming fees) unless I lock on to t-mobiles network?