Thank you, that suggestion fixed mine, too. I went to the APN and just selected the one I already had set up and my mobile data started working again. Somehow it had become deselected.
Rooted with Evita All In One toolkit and installed Viper XL. FM Radio and flashlight are back, and all the ATT crapware is gone. Best thing I ever did with the phone.
Got it to change my CID, got the .bin file, but it won't unlock the boot loader. Data transfer error. Any suggestions?
Edit-- Got it to work. Tried with different data cable. Super smooth after that. Now running Viper and very happy.
I just moved and had a few days without internet/wifi at my new home. My One X had a hard time keeping the battery charged when on LTE-only. It probably didn't help that I had 2 bars at the house instead of the full signal I'm used to, either. Before the move, I could leave the phone on...