Hi,
Just got a OnePlus 5t and wanted to install /e/ on it. Following install instructions it works fine up to the point of the installation of /e/
I started talking about it on this thread but thought it desevers a separate discussion
Quick rundown of what I tried:
Installing /e/ via adb sideload > transfer “finishes” around 50% device shows installation failed message
Installing /e/ via internal storage > installation fails
Using different version of twrp > same result
Checking md5 hash of the /e/ install file > appears correct
Installing different version of /e/ > installation failed
Installing onePlus 5t firmware update 5.1.7 provided from the wiki page > installation failed
Pc is running windows 10, All tests were performed on 19.01.2019
Thanks for your suggestions! I just tried both versions of twrp that you suggested, but still get the exact same behaviour
Really gots no clue what could go on
Personally I didnt do any rom upgrades, but the phone is 2nd hand. It runs more or less the latest oxygenOS, i.e. android 9. I think the oneplus 5t was originally released with android 7, you think that might be the main issue? I was wondering if I should attempt to roll it back to oero
Hi @Manoj
Thanks for your advice, I rolled my onePlus back down to 5.1.7 aka oreo (Android 8.1.0) and then tried the whole thing again
I am still getting the same result though, Installation failed. When I try install the firmware referenced in the install wiki, I get the message: “This is a downgrade operation Need to erase user data, continue?” when I press “Yes” I just get the old “Installation failed” message.
Adb sideload method still fails at 47%
Any other ideas?
@Carlos the adb sideload part can you try it through TWRP. There is an adb sideload option under TWRP under Advanced. Once there you can run adb sideload command from PC.
@Manoj So far I’ve always tried adb sideload through TWRP i.e. the exact way you described it, I didn’t even realise you could do it through a different way
I think I may have found the issue
Just googled oneplus5T stock android recovery … i don’t think the way I flashed twrp worked, i.e. the whole time it was just using the standard recovery and me never having done this thought I was in twrp and it was all hunky dory, will post another update later on tonight when I get the chance to try it out
Good to hear that your issue is resolved. Please can you elaborate as to what you did differently now…it might be useful for other users of the same phone.
@Manoj
Sure! I watched a video of a guy flashing twrp and he had two extra steps might be either one of those, but im guessing its probably the later.
copied the twrp image into the adb platform tools folder
following the instructions i hadnt realised you can boot into recovery from within fastboot, and the adb reboot recovery command didnt work within fastboot. So previously i had rebooted the phone into the system after flashing twrp, from there i booted into recovery using the adb command.
In my successful attempt i booted straight into recovery from fastboot by selecting the option with the vol down/up buttons (i had not seen the option listed, but could select it)
Also in my successful attempt i executed the flash command in powershell, but again i dont think that was it i was still using cmd for the other commands
After installation was complete twrp asks if you want the app installed, saying yes also messes with the install apparently. I had misclicked (because i got too excited) and after that it kept just booting into recovery. I redid the wipes/install checked the “reboot after installation complete” checkbox and disagreed to the twrp app install and it worked perfectly then
Ha, such a noob mistake to not realise i wasn’t actually in twrp before
yesterday 
