Can i install ios 13 beta to iPhone 6

No, it’s not possible.

iPhone 6 is not compatible with iOS 13 and won’t support it when it will be released.

Yes, it is possible, but I'd highly advise against it.

Not only is the beta very buggy, your 6 would be taxed to complete the processes used in normal phone usage. I'd wait until the full launch this Fall.

EDIT: My apologies, you're unable to update if you have a 6. Only 6s and higher can support the upgrade.

Yeah. iPhone 6 is a pretty old device now.

No doubt. It’s hardware is just not powerful enough to run iOS 13.