Originally Posted by farazhassankhan
I have purchased a used at&t One X from one of my friends. It has "Locked" bootloader with SuperCID and S-OFF. Can I revert back to stock CID with having bootloader in "Locked" state or do I have to unlock bootloader first in order to get "fastboot oem writecid CWS__001" command working.
Phone is on 4.0.3 firmware and software number is 1.77.XXX. Phone is not able to receive any update when I try to update software in settings and I believe that is because of SuperCID.
Your belief would be wrong. Its not SuperCID that is preventing you from getting the update, but rather the fact that you missed a previous update (1.85, 2.20 and 3.18). The OTAs have to be installed in sequence, and if you somehow skip one it messes up the whole process and you can no longer update by the "normal" method of checking for updates in Settings. And not getting an update by no error of your own is not unusual (seen plenty of folks here that have had that issue). Probably just some glitch in the OTA systeam. So that is probably what caused you to be in your current situation.
I would suggest not messing with the CID, but rather just go to the following thread, download the AT&T 3.18 RUU to a Windows PC and run it with your phone attached by USB. This will get you on the latest available RUU (RUUs do not have to be installed in sequence as OTAs do). Then hopefully you will be able to get the 5.18 OTA that is currently rolling out.
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Phone: HTC One X (AT&T version) Rooted, Bootloader Unlocked, S-Off
Tablet: Samsung Galaxy Note 8 (WiFi only) Rooted