I just got a new Lumia 635 from the Microsoft Store for the $39.95 deal. Sweet phone, especially at the price, but now I'm having the problem some are having in that I can't get mms to work. Service provider is H2O on the AT&T network. Just finished a chat with an H2O rep who gave me the APN settings, but they aren't working. I'm in a good reception area with 4-5 bars of 4G service, and mms was working on a Lumia 520 I took the SIM card out of. Everything else works fine. Anyone else experiencing this?