Solved! Go to Solution.
I was just getting ready to post this. I went to the store yesterday and they spent about an hour with tier 2. Tier 2 said it was a problem with the phone and there wasn't anything they could do. I explained it was working when I brought it in and switched SIM cards, so that couldn't be the case. I switched LTE off and 3G was working, then I started searching the net and found an article regarding profiles and deleted the profile and everything worked. I passed this info back to Xfinity so they could hopefully help future customers better (instead of saying sorry but we can't help further).
(Mrdenial, you have to post publicly before you can send a private message. Please do not send unsolicited private messages as that violates the forums guidelines).
Glad you were able to get your cellular data working. Post again if you need anything else.