I'm sure this has been answered somewhere, but I've searched and can't find it. I just set up tethering on AT&T because I'm staying at a hotel that charges a ridiculous amount for internet. I downloaded the mobileconfig file from http://help.benm.at/help.php. It's working fine, but I don't know what to do when I'm done with tethering. I don't want any trace of it left on my iPhone because it's messed up my visual voicemail. So first off, does this install a new carrier file? I most of the other tethering hacks involve installing a modified carrier file, so does this one? If it does, how can I revert back to AT&T 4.0 (I think that is the most recent one)? I've heard if I just "Reset Network Settings" it will do this. If I restore from a backup, will it also do this?