Did you just joined AC forums today (03/31/17) to tell everyone you've gotten your V20 bootlooped, but have not shown us a video proof of it? I also don't believe it because there has been zero cases of any LG G5 or V20 boot looping.
If you are being truthful, first off, it could be the following reasons why it is happening:
- Exposed the device to water: phones with water damage will bootloop. There is a small white sticker on the battery and back of the device. If it shows a red XXXX symbol, then that means you exposed it to liquid. Did you expose it to water or any humid environment? (Sweat, steam room, bathroom, etc.) Show us a pic to verify.
- Turned off the phone or removed the battery during an OS update. Very common, not a real bootloop but corrupted OS. This is fixable. Did you turn it off during an OS update?
- Overheated: At very extreme temperatures, the phone will get damaged internally. Were you in or near a very hot environment?
- Magnetized: Magnets will damage electronics, usually very strong ones. Did you have magnets near it?