Problems installing UT on OnePlus 3T

[shapley]

Hi Users,

I'm having similar problems to others trying to get UT installed on OP3T. I get the usual 'Connection to device lost' message then 'Try again' repeating loop. Then tried going into 'Android Recovery' -> 'Android Actions' -> 'Advanced' -> 'Wipe system partition' -> 'Yes' ...now have this notification:-

--Wiping system...
formatting/System...
format_volume failed to unmount "/System"
System wipe failed

...perhaps someone can walk me through the TWRP procedure instead.

Many thanks

Shapley

[Lakotaubp]

@shapley Need to double check but instll the correct twrp for the OP3t using fastboot format all partions to ext4 then run the installer all details in here https://forums.ubports.com/topic/3253/oneplus-3-3t/313 not just right at the top but a few post down as well.

[A Former User]

Hi @shapley , I might be able to help. I remember that you had been trying to get ut on to the op3t some time ago and I notice that the instructions at the top of the Device thread have changed since then. When I installed on my 3T I managed without twrp, but only just! That was mainly because I hadn't used twrp before and found the prospect too intimidating at that time, so I persevered with other guidance that was offered combined with a bit of dumb improvisation! You have read all of this on the Device Thread, yes?

Since then I have installed twrp a few times on other devices and have become a bit more familiar with it, but still a learner.

What is the state of your 3T at the moment (os, no os?) and are you familiar with installing twrp in the first place? I'm guessing you are...

[A Former User]

@shapley
This will give you info on installing twrp and wiping partitions
https://doc.e.foundation/devices/oneplus3/install

This shows you how to see partition file system info from the twrp interface, and change to ext4 if necessary
https://www.youtube.com/watch?v=8AbU_2z07Vg