[HTC U11  Guides, News, & Discussion] 5m4r7ph0n36uru:
Hello folks,

as for me such guides were really helpful in the past, and there are alway poeple who are new to a device and modding it, I decided to do one on my own, to show you how to perform a reset of your HTC U11 to Full Stock ROM/Firmware.

In many points I tried carrying together all that has been written down prior to this guide in many others, by many others. Thus I - in some kind - just consolidate the fact, using my own words and a little bit different structure than others. Anyway I'll show you my steps again in this tutorial as I think it is of importance to many that they can read the hole to do in one thread. But I advise everyone.

Please note that I will not accept any responsibility for possible occurring bricks. I can only confirm that this tutorial has been used by me, for my specific unit and all went successful.

Look here for [Collection] HTCU U11 – RUU/Firmware/Recovery/OTA/Backups

Regards

[IMG="Contents"]https://c1.staticflickr.com/1/738/32720096555_cdab9a4997_m.jpg[/IMG]​

Restore using a Nandroid Backup

Restore using a RUU

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Knowledge of adb/fastboot

htc_fastboot and adb installed

HTC U11

[IMG="RUU Errors"]https://c1.staticflickr.com/1/711/31908280713_49405f6951_m.jpg[/IMG]​

07 RU_CID_FAIL: CID in android-info.txt does not match your phone’s CID

10 RU_MODELID_FAIL: MID in android-info.txt does not match your phone’s MID

12 SIGNATURE FAIL: phone expects an HTC signature and can't find one; or found a wrong one

22 RU_HEADER_ERROR: something wrong with your zip; check md5 of download

23 PARSING IMAGE FAIL: something wrong with the image within the zip

24 ANDROID-INFO FAIL: something wrong with android-info.txt within the zip

32 HEADER ERROR: the zip couldn't be read and unzipped properly; seems same as 22.

33 NOT KNOWN YET: might indicate hardware failure.

35 FAILED (remote: 35 RU_PARTITION_NOT_SUPPORT <PartitionName>): means you can’t flash an image in download mode, as it has to be done in bootloader mode.

41 WRONG MODEL ID: means the RUU is menat for a different device

42 WRONG CUSTOMER ID: means you got to swap CID first

90 PRE-UPDATE FAIL: means it only flashed aboot and you have to run the process again immediately to flash all other partitions. The htc_fastboot.exe now auto-reboots on Error 90!

99 UNKNOWN: usually indicates you are S-ON, but sometimes also recognizes other Security related issues.

130 WRONG MODEL ID: see 41

155 INDICATES DIFFERENT THINGS:

the need to relock bootloader; if S-ON

the RUU cannot be executed, because the software versions of ROM, Firmware and RUU aren't matching

170 CHECK USB: RUU won’t run because ADB isn't working properly

171 USB ERROR: happens all the time when the RUU reboots the phone to download mode. For some reason the device is losing its connection and making a RUU flash virtually impossible . There is an incompatibility between USB 3/3.1 and Fastboot/ADB, as well as an issue with Windows Device Detection on the newer Windows 10 builds.

171 USB ERROR FIX by [MENTION=1102297]Sneakyghost[/MENTION]:

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