I was fortunate enough to catch NetShare on the AppStore and have been using it for my tethering needs. Seems to be undetected by my provider, as this one seems

I was fortunate enough to catch NetShare on the AppStore and have been using it for my tethering needs. Seems to be undetected by my provider, as this one seems a bit more official with a comment on the YouTube instructional video indicating that ATT did charge them for their tethering, using this method.