[Moto G5 Plus Questions & Answers] razr07:
Installed Oreo ROM via fastboot on my Moto G5 Plus [RETIN/Indian/ XT1686]

I am sharing my experience here so that it might help someone looking to flash stock ROM via fastboot. This is not meant to be a tutorial, but I will list out the steps I followed. I am not responsible if you mess up or hard/soft brick your device when following the steps I mentioned below. Always make a backup of your data/photos/videos/music and whatever else. Also make a backup with TWRP to be safe.

So instead of following the guide linked in the above post, I followed this one and successfully unrooted and returned to stock: https://xdaforums.com/g5-plus/how-to/moto-g5-plus-fastboot-flash-stock-oreo-t3848433

But I did not use the ROM linked by the OP in that thread. Instead I downloaded this one : https://mirrors.lolinet.com/firmwar...ubsidy-DEFAULT_regulatory-DEFAULT_CFC.xml.zip

This RETIN ROM works for me because I have the Indian XT1686. I don't know if it matters but I had the same version (13-5) before, but I am not sure whether it was RETAIL or RETIN.

Anyways guys make sure you download the right ROM for your device if you are going to install via fastboot. You can download the right ROM for your device from here: https://mirrors.lolinet.com/firmware/moto/potter/official/

There are different folders for ROMs of different regions in the above link. So carefully download the one your device is compatible with.

Also, I installed fastboot drivers from here: https://xdaforums.com/showthread.php?t=2588979

Follow the instructions and also follow the video tutorials in the post to install fastboot drivers if your phone isn't detected in fastboot.

Then once I had downloaded the ROM and installed ADB, I extracted the ROM zip into a folder. Copy pasted ADB Files into the same folder (download ADB Files that worked for me _ attached to this post below).

FInally I put my phone in fastboot (turn off phone, then press volume down and power simultaneously till fastboot shows up). Connected the phone to my PC. Then opened CMD in the folder where I had extracted the ROM and copy pasted the ADB Files. To open cmd in a folder, just type cmd in the address bar of the folder and press enter.

And then I copy pasted the following code into the cmd window:

fastboot oem fb_mode_set
fastboot flash partition gpt.bin
fastboot flash bootloader bootloader.img
fastboot flash logo logo.bin
fastboot flash boot boot.img
fastboot flash recovery recovery.img
fastboot flash dsp adspso.bin
fastboot flash oem oem.img
fastboot flash system system.img_sparsechunk.0
fastboot flash system system.img_sparsechunk.1
fastboot flash system system.img_sparsechunk.2
fastboot flash system system.img_sparsechunk.3
fastboot flash system system.img_sparsechunk.4
fastboot flash system system.img_sparsechunk.5
fastboot flash system system.img_sparsechunk.6
fastboot flash system system.img_sparsechunk.7
fastboot flash system system.img_sparsechunk.8
fastboot flash modem NON-HLOS.bin
fastboot erase modemst1
fastboot erase modemst2
fastboot flash fsg fsg.mbn
fastboot erase cache
fastboot erase userdata
fastboot erase customize
fastboot erase clogo
fastboot oem fb_mode_clear
fastboot reboot

The above commands will run when pasted in cmd and your phone will be flashed with the ROM. It took a couple minutes to install and then I had to press enter while still in cmd to reboot the phone. Then the phone rebooted. Took a couple minutes more to boot, so stay patient. Then once the phone booted, I disconnected it from my PC and set the phone up as usual. DO NOT disconnect the phone when the fastboot commands are running and the ROM is being flashed. Note that the above fastboot commands will only flash the ROM. It will not lock the bootloader.

If you want to lock the bootloader then follow the instructions here: https://xdaforums.com/g5-plus/how-to/moto-g5-plus-fastboot-flash-stock-oreo-t3848433

Note that I haven't locked my bootloader. So you will have to try and see for yourself whether it locks your bootloader.

Also once I booted up I got update notification and was able to update to the Feb 2019 OTA security update. So I can for sure say that updates work. VoLTE, calling, camera, almost everything I checked works.

Cheers. :victory::D