Because LG has officially shut down its bootloader unlock server, many LG G7 ThinQ users today must rely on unofficial exploits (like the LG Fastboot-Enabler via 9008 mode ). Check the XDA Forums for your specific sub-model (LM-G710, LM-G710VM, etc.) before proceeding, as forcing Fastboot on a Verizon or AT&T variant is the number one cause of permanent bricks.
Here is the definitive guide to opening Fastboot Mode on your LG G7 ThinQ using the most reliable methods. Method 1: The Hardware Button Shortcut (Fastest Way) How to Open Fastboot Mode on LG G7 ThinQ
In Fastboot Mode, you can perform high-level tasks such as: Because LG has officially shut down its bootloader