Switch to Sprint and save $350 on iPhone X. Get the iPhone X (64 GB) for $22.22 per month with Sprint Flex and eligible trade-in. And that’s just the beginning, with iPhone Forever, exclusively from Sprint, you can upgrade to the latest iPhone after 12 lease payments. Sprint's network reliability is within 1% of the other guys. And they have the BEST price for Unlimited. Call (855) 371-5002 or click Claim Deal.