Sorry I forgot to post full instructions - here they are:-
1) Download all the relevant files. You'll need:-
a) RUU from https://forum.xda-developers.com/htc-u11/how-to/htc-u11-stock-rom-ruu-t3741849 (1.24.401.2 Europe)
b) Hex Editor (I used HxD from https://mh-nexus.de/en/hxd/
c) TWRP from https://github.com/sabpprook/android_device_htc_ocm/releases/download/3.2.1-2/twrp-3.2.1-2-ocm.img
2) Unlock your bootloader by going to https://www.htcdev.com/bootloader/
3) Boot into download mode, connect your phone via USB and run (just for reference):-
fastboot getvar cid
4) Install TWRP by running:-
fastboot flash recovery twrp-3.2.1-2-ocm.img
5) Boot into TWRP recovery
6) Select Advanced -> Terminal and enter:-
dd if=/dev/block/sdf1 of=/sdcard/sdf1.img
7) On your PC run:-
adb pull /sdcard/sdf1.img
8) Open the image in HxD and locate HTC__621. Replace with HTC__001. Save the updated disk image
9) On you PC run:-
adb push sdf1.img /sdcard
10) Back in TWRP run:-
dd if=/sdcard/sdf1.img of=/dev/block/sdf1
11) Boot into download mode and verify your updated CID by running:-
fastboot getvar cid
12) Prepare an SD card with the RUU in the root of the card, renamed as 2Q4DIMG.zip.
13) Power off phone & insert SD card. Boot back into Fastboot.
14) You should be prompted to install the RUU. Use volume and power to start the process. This will take a long time.
15) Phone should then boot up in WWE mode.
16) At this point you can relock your bootloader by booting back into download mode and entering:-
fastboot oem lock
Sent from my HTC U11 plus using Tapatalk
Please help
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