[Downgrade][S-ON] Downgrade by flashing older version of official RUU

[ryzeguy]

When you enter the command "adb pull/dev/block/sde1" in recovery mode, fastboot writes -"device unauthorized. Please check the confirmation dialog on your device." What's wrong?

 

[q3ahmd]

adb does not see my device in recovery mode.

 

[q3ahmd]

When you enter the command "adb pull/dev/block/sde1" in recovery mode, fastboot writes -"device unauthorized. Please check the confirmation dialog on your device." What's wrong?

I am facing same issue. Did you manage to solve it?

 

[ryzeguy]

I am facing same issue. Did you manage to solve it?

No

 

[Glower]

I'm trying to downgrade from pie to oreo, with no luck so far. I used the Devinfo_Tool from Sabpprook https://forum.xda-developers.com/htc-u11/development/unofficial-htc-u11-twrp-recovery-t3706264/page32 and with it I managed to change version. Now I can see my os number is 1.24.401.7, which is fine for me. But in download mode I see that os number is pie's (2.19.401.2). In sde1, though, pulling it with adb, I read 1.24.401.7. Weird. Still I'm not able to flash oreo RUU, getting error 12. So I tried to flash hosd_signed.img from RUU I'm going to flash as stated in this thread https://forum.xda-developers.com/showpost.php?p=79616165&postcount=1911, but I'm not able to afford it, fastboot returning error unknown. Tried everything found in various threads (switch USB port, switch pc, reinstall drivers, switch cable, etc) but still no luck.
Any help would be highly appreciated

 

[Glower]

Still I can't flash RUU. Can someone who achieved to flash hosd.img please explain how he managed to do it?
Fastboot reports file size is too large, while htc_fastboot, which I successfully used to flash larger files, stays pending 'sending hosd'

 

[dimitrakhs1]

It won't work(or some steps are missing here.I spoke with HTC.Unfortunately they didn't seem to publish any full pie ruu.I need to make a clean install

 

[dimitrakhs1]

Hello my friend.Obviously we're interested on your post but we don't get all you writing.For example how you get sde1 file?In recovery?Do we have to open TWRP Terminal there?Or you open terminal from adb file explorer on our laptop?Is it possible to do a step by step guide?Much appreciated

 

[foosoomin]

@handsome_hell,


If my phone is everything from factory ( S-On, Locked bootloader, official software ), do i have to unlock bootloader to pull SDE1 file ?

 

[kyhuu007]

how to install TWRP androi 9.0

 

[hth8390]

can downgrade from 9.0 to 8.0?