I don't have the V30 yet, but I've tryed all kind of brand for samsung's curved phones. None of them works as expected. Didn't tried the liquid sticker toh

The "best" screen protector for curved screen is the one "incomplete" that cover just the flat part and leave unprotected the curved part :/

edit: or just use the old plastic screen protector instead of glass, I saw a model that partially wrap the phone: https://www.amazon.com/Ringke-Protector-Compatible-Invisible-Clearness/dp/B0741392S3/ But the reviews are very bad.

edit2: https://www.youtube.com/watch?v=9DprVa2rPIk The only way to fully protect the phone is to use the "rugged waterproof case" ugly and huge like this one: https://www.amazon.com/Protector-Shockproof-Dust-Proof-Splash-Proof-Protection/dp/B07DKXTHXQ/

if you find something good let me know :)

EDIT: eewww, did I said anything wrong ? -_-