No idea I'm afraid. All I've ever done is put the SIM in, and it's configured to what you see. Did have to login to Audi Connect again recently - but that can't affect the APN and username settings that it gets from the SIM. You do have a pre-loaded X months/X Gb data SIM? Not a normal PAYG or contract one? My two cards have been the pre-loaded Data SIM ones.