So the day after we thought we resolved this, my phone has gone back to getting error messages when trying to view videos or listen to music on 4G network. I get "media file type not supported" when trying to view Facebook videos and on Youtube I just get a "there was a problem while playing, touch to retry". I have also realized that I cannot stream music, either through Amazon or Google, and cannot even listen to a song samples before I buy. But as soon as I get on a Wi-Fi network, I can do all of the above.
Any suggestion? Do I need to just bring it in?