gnowegroeg Unlike you I have no self control, so I have experimented...to no avail... I have always had AT&T Unlimited Data with BES and tethering. That SIM card is like gold to me, I use it as my Internet on meetings and its invaluable. I got curious.... I bought a Q10 from Tmobile, waited 90 days, told them I was leaving the country and unlocked it. All three values say unlocked
I literally cut the SIM, popped it in as if it were a Micro SIM and it works on Q10 except for the ever so frustrating APN username/password issue....No tethering.
Wondering if you could set the username and password - depending on the type of characters/symbols.... For example...
Unfortunatley AT&T has an "@" in the username field which , if this were to work, the "@" would obviously symbolize the hostname...so I cannot test it, but maybe worth a shot?