I just followed the information in the first post and I now have MMS and Tethering working just fine.
Thanks for the great information.
US AT&T is my carrier.
Do either you or JasonHiccup have a name of the rep you spoke to? I just tried calling AT&T twice and neither one would do it.
I also am a business customer so I spoke with Business Customer Care but they would not budge no matter what I said.
If you know the reps name I would greatly appreciate it because I could ask for them and get this working. Tethering was a piece of cake. Thanks for all the help. This is the only step I can't get past!!