No bubbles, case friendly, and good quality. These two are the only ones I know that work if you are looking for a tempered glass screen protector. I believe they have lifetime warranties so if something goes wrong, just contact the seller. Will report back updates with them.
LG V40 Screen Protector, Poetic [HD Clear][Case Friendly][Anti-Fingerprint] Premium Tempered Glass Screen Protector for LG V40 (2018) - Clear/Black https://www.amazon.com/dp/B07HNNBJL...ag=hawk-future-20&ascsubtag=UUacUvbUpU6389383
[2 Pack] GLASS-M LG V40 ThinQ Tempered Glass Screen Protector, Ultra Clear, Scratch Resistant, Bubble Free, Anti-Fingerprint Screen Protector Film, 9H Hardness, Case Friendly Premium Protection Shield
https://www.amazon.com/dp/B07HRJFCL...ag=hawk-future-20&ascsubtag=UUacUvbUpU6389383
LG V40 Screen Protector, Poetic [HD Clear][Case Friendly][Anti-Fingerprint] Premium Tempered Glass Screen Protector for LG V40 (2018) - Clear/Black https://www.amazon.com/dp/B07HNNBJL...ag=hawk-future-20&ascsubtag=UUacUvbUpU6389383
[2 Pack] GLASS-M LG V40 ThinQ Tempered Glass Screen Protector, Ultra Clear, Scratch Resistant, Bubble Free, Anti-Fingerprint Screen Protector Film, 9H Hardness, Case Friendly Premium Protection Shield
https://www.amazon.com/dp/B07HRJFCL...ag=hawk-future-20&ascsubtag=UUacUvbUpU6389383