Stuck in bootloader when update to OREO.

[sing2x]

My HTC U11 always stuck in bootloader saying I use an unauthorized software everytime I update to Android Oreo ( official OTA update).
Even if I use RUU to 8.0.
The only thing I can boot my phone is when I use Nougat Rom. Even Costum Rom not helping. It;s very weird that I cannot update to 8.0.
I try leedroid Rom, also same, got back to Bootloader. So I need to reflash the 7.1.1 Rom to enable to boot.
My phone is S-Off with Bootloader Unlocked.
When I try to relock bootloader it will say something like
(bootloader) [KillSwitch] : /dev/block/bootdevice/by-name/frp
(bootloader) [KillSwitch] Last Byte is 0X00, disable unlock
(bootloader) [KillSwitch] oem unlock Turn Off!
OKAY [ -0.000s]
finished. total time: -0.000s
In the Menu is greyed out saying bootloader already unlock.
Thanks in advance for any help.

 

[5m4r7ph0n36uru]

My HTC U11 always stuck in bootloader saying I use an unauthorized software everytime I update to Android Oreo ( official OTA update).
Even if I use RUU to 8.0.
The only thing I can boot my phone is when I use Nougat Rom. Even Costum Rom not helping. It;s very weird that I cannot update to 8.0.
I try leedroid Rom, also same, got back to Bootloader. So I need to reflash the 7.1.1 Rom to enable to boot.
My phone is S-Off with Bootloader Unlocked.
When I try to relock bootloader it will say something like
(bootloader) [KillSwitch] : /dev/block/bootdevice/by-name/frp
(bootloader) [KillSwitch] Last Byte is 0X00, disable unlock
(bootloader) [KillSwitch] oem unlock Turn Off!
OKAY [ -0.000s]
finished. total time: -0.000s
In the Menu is greyed out saying bootloader already unlock.
Thanks in advance for any help.

Am output of a

fastboot getvar all

might show us some more, to help you with that very problem. Don't forget to delete your IMEI and SN though.

Tell us which RUU you are using that causes this very problem as well.

Sent from my HTC U12+ using XDA Labs

 

[sing2x]

(bootloader) kernel: lk
(bootloader) product: htc_ocnwhl
(bootloader) version: 1.0
(bootloader) max-download-size: 1562400000
(bootloader) serialno: FA76T1802xxx
(bootloader) slot-count: 0
(bootloader) current-slot:
(bootloader) imei: 990007230168xxx
(bootloader) version-main: 1.28.617.6
(bootloader) boot-mode: download
(bootloader) version-baseband: 8998-001791N-1709131257
(bootloader) version-bootloader: 1.0.0.0000
(bootloader) mid: 2PZC50000
(bootloader) cid: BS_US001
all:
finished. total time: 0.016s

 

[sing2x]

Any RUU, any costum Rom based on Android 8.0 give me error.
Other than that, all 7.1.1 Roms / RUU boots just fine.
It's Sprint Unit , S-Off , and change to BS-US001
return to sprint Rom also no use.
I can receive OTA no problem.
After OTA to 8.0 stuck in Bootloader again saying same error.

 

[5m4r7ph0n36uru]

Any RUU, any costum Rom based on Android 8.0 give me error.
Other than that, all 7.1.1 Roms / RUU boots just fine.
It's Sprint Unit , S-Off , and change to BS-US001
return to sprint Rom also no use.
I can receive OTA no problem.
After OTA to 8.0 stuck in Bootloader again saying same error.

Well that's it actually. The device only accepts CDMA sprint updates. So it would have to be rebranded and RUU'd back to Sprint to receive updates again. But are you really using an HTC U11? The fastboot command mentions a slot which in general only applies to Treble enabled devices.

Sent from my HTC U12+ using XDA Labs

 

[sing2x]

Ruu back to sprint. Also cannot upgrade to 8.0. Even on OTA update. Yes its U11.

 

[sing2x]

Any help ? it only works with 7.0 Rom. I try almost everything.