Nothing is obvious for me ha, but I did restart the device--no luck. And you are correct, mine says "AT&T 4.0". But where is the 5.0 IPCC?
Just to recover my steps, I just restored the phone and redid the steps with still no luck! Here are my steps:
1) Go to: http://help.benm.at/usa.php
2) Select AT&T
3) Install confirm
4) Hit Done
5) Restart
Still no luck... any ideas? And finally, I don't know how to change the 4.0 to 5.0, are those additional steps?
try network reset, works for me