[OnePlus 8 Pro Questions & Answers] MacGyver91:
Mod translation

Hello everyone,

i need your help to save/flash my oneplus 8 pro smartphone please. (if you don't have time, you can jump directly to the line)

shortly before. the first time i installed a custstom rom + root was about 10 years ago and was a samsung galaxy s2. then cyanogenmod.

I also provided the following htc m8 with a custom rom and in turn the successor the htc u11 too (with lineage os 18.1).

So you could assume, through the (altogether determined 10) flash processes, I would slowly know how to do it….

now i am the proud owner of a oneplus 8 pro. i chose oneplus because the brand is considered “developer friendly” ￼

now i sat down on monday evening and wanted to try the /e/os first. since 10 years have passed since my first attempts at flashing, i thought to myself, "it's definitely going to be very relaxed these days".

of course i knew secretly that it will be 10 hours of work again.. ￼

so I downloaded the (compatible) easy-installer from /e/os. this has recognized and accepted the mobile phone, then downloads a 95mb file and stops right there. Rebooted 10 times, added virus scanner exception, different usb port,... it didn't work.

after several back and forth and further research i thought to try the latest lineage os20 and install the "min microg" variant. (I want as little google as possible, but I don't feel like having a second cell phone with a stock ROM for things like snapchat, share depot, savings bank)

now you know the history, sorry for digressing. from now on my problem comes to normal custom rom flashing.

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i downloaded and installed the platform tools.

also the usb drivers and also via device manager, list,... added/installed. the phone will appear under android devices bootloader,…

then i downloaded lineage os from their site and also followed the instructions.

handy developer mode, usb debugging, usb – file transfer,..

bootloader unlock (that probably worked, the bootloader says device state unlocked)

Flash dtbo.img (the data was transferred via cmd-fastboot, I don't know if anything happened. the cell phone screen remained unchanged in the bootloader)

flash vbmeta.img (the data was transferred via cmd-fastboot, I don't know if anything happened. the screen of the cellphone remained unchanged in the bootloader)

then I flashed the lineage recovery (or I think it was only boot) and something went wrong.

after the reboot I got into a recovery, but since no lineageos cover was visible, I knew that I ended up in the wrong recovery. after another reboot nothing worked. When booting, the message "The current image(boot/recovery) have been destroyed and ca not boot. please flash the correct image or contact customer service to fix it.” Since then I have tried almost everything to fix the problem. Unfortunately, I no longer have adb access, but he can find the cell phone via fastboot devices. I tried to boot the twrp recovery (cell phone restarts and ends up in the bootloader again). the same applies to the lineageos recovery. even if i select “recovery mode” in bootloader, i end up in bootloader again….

Next I wanted to go back to the stock rom to start again.. I noticed that I had android 13 installed, the stock roms on the net (oneplus probably doesn't officially do that anymore) but all have smaller android versions. what the heck, I think that's not so tragic..

so i downloaded the package "11.0.0-europe-oneplus8prooxygen_15.e.30_ota_0300_all_2009301818_f85a40a8ec66246-fastboot", which includes a "flash-all.bat" file.

I was happy and started the thing. he then also writes hundreds of things on the phone but after about 10 seconds the commands are all “fastboot error: command failed”. Invalid sparse file format at header magic. Then he sends a sparse "system" and gets the message "FAILED (remote: "Partition not found").

I don't want to type everything out for you, the bottom line is, I end up in the boot loader again and can't do anything except switch off the cell phone and click away the error "The current image(boot/recovery)..." when restarting. Pressing the keys in recovery still doesn't work.

I ask for your help and I'm slowly at the end of my wits.

By the way, the aim is to have a custom ROM, including as little Google as possible (not without it), with root and a permanently flashed recovery.

I thank you 1000 times