I'm in a lease I want out of as well. I've been trying to find and think of every work around. Basically all you can do is switch to a carrier who offers a buyout program, like T-Mobile. But be very careful with the fine print.
With T-Mobile, they'll give you a prepaid rebate card within two months of switching, but you have to give them your phone and you are enrolled into their T-Mobile ONE unlimited plan and must purchase a device through them.
If all of those stipulations are fine, then go ahead. So long as you can front the cost and last for two months before the card comes, it's technically a clean switch.
Personally, I want a OnePlus 3T which T-Mobile doesn't carry, and I'm not fond of the ONE plan and don't want to pay for what I won't use. Apparently there's a feature called "kickback" where they refund you for data you don't use, but I haven't extensively looked into it.
tl;dr, there are options, but be very careful to research thoroughly.