Team Win Recovery Project v3.0.2 For LG G5 (H850)
LG G5 (H850) is the only one variant that officially Unlocked Bootloader from LG.
LG G5 Has many variants Like:
H850 (Europe); VS987 (Verizon); H820 (AT&T); LS992 (Sprint); H830 (T-Mobile); US992 (US Cellular); Vodafone
H860N with dual-SIM card slot
So Please Check Before Flashing.
Warning: The Stock H850 has Boot img has dm-verity, which keeps you from booting. swipe to enable system modifications.
Download TWRP v3.0.2 For LG G5 (H850):
How to Flash TWRP and Root LG G5:
First, unlock Bootloader: Click Here to Unlock Bootloader
Download TWRP from the above Link.
Open the Same Fastboot mode like you done in Unlocking Bootloader.
Type below words in command:
fastboot flash recovery twrp-3.0.2-0-h850.img
After successful flash. Again Type below Words:
fastboot boot twrp-3.0.2-0-h850.img
At this point, you will ask to swipe to enable system modifications (Do that)
Now you will see full TWRP Recovery Options.
After all download SuperSU From this Link
Transfer it to your LG G5 Storage by Enabling MTP.
Flash the SuperSU from your TWRP Recovery.
Done, You have Successfully Rooted LG G5 and Installed TWRP Recovery.