Originally Posted by Sluff
Since you said you haven't done anything to your phone, meaning rooting it, S-OFF etc. What's stopping you from getting a warranty replacement?
If the phone is still under warranty, this is what I would recommend. Some One X's have simply given up the ghost lately due to hardware failure of whatever reason.
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Phone: HTC One X (AT&T version) Rooted, Bootloader Unlocked, S-Off
Tablet: Samsung Galaxy Note 8 (WiFi only) Rooted