…Enter suggestions to improve documentation in this category. Do not raise bugs or issues here…
Hi Manoj,
Here are some modification I propose for this doc. Hopes it helps 
There is a mistake in this LG v20 installation documentation (same in the upgrade doc)
At chapter "Booting a custom recovery using fastboot" under step 3:
This block :
You can also boot into fastboot mode via a key combination:
- With the device powered off
- hold Volume Up + Power.
Should be replaced with:
You can also boot into fastboot mode via a key combination:
- With the device powered off
- Prepare a USB-C cable, plug it only to the PC
- hold Volume Down + Plug the other extremity of the cable to the smartphone
Ref: Fastboot Mode LG V20, how to - HardReset.info
Another info you can under chapter “Booting a custom recovery using fastboot” is that :
- the newest TWRP twrp-3.6.0_9-0-h990.img is working with Android R version (Download twrp-3.6.0_9-0-h990.img)
Finally under chapter “Requirements” add this warning:
- After unlocking the bootloader when TWRP installed, performing a full NANDroid backup is hightly recommended (partitions /boot + /system + /data + /system-image + /efs)
As you may be aware, we follow the LOS wiki guide for devices which do not have a dedicated maintainer. The LOS wiki key combinations are replicated on the /e/OS guides as well.