Originally Posted by nishantbalwan
I am also thinking to sell this phone so I would like to restore it to AT&T's ROM so that next user can have no problems with it so far, even with warranty.
If that is the case, you should probably make the phone S-on again, and change to the proper AT&T CID.
Giving an s-off phone to an unsuspecting buyer is a bad idea. SuperCID is even worse (due to the brick risk with RUU and S-on).
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Phone: HTC One X (AT&T version) Rooted, Bootloader Unlocked, S-Off
Tablet: Samsung Galaxy Note 8 (WiFi only) Rooted