I gave up on contracts, financed phones(LOL!), two years ago.
I advise you do the same.
For AT&T it's actually cheaper, and even advantageous if you don't plan on upgrading for 2 years.
My iPhone 6 64GB costs $299 on-contract, which comes with a $15/month increase on my Mobile Share plan.
Off-contract, it would cost $749. Total cost off-contract: $749.
Total cost on-contract: $299 + ($15 * 24) = $659
Savings of $90 for being on a contract.