T-Mobile plans $200-plus discount on Apple's iPhone X starting Feb. 23

The deal is subject to a number of restrictions. Buyers must, for instance, trade in an older phone, and pay the regular price upfront — in the case of a 64-gigabyte model, a $279.99 downpayment and $30 per month for two years, plus the associated data plan.

The discount comes in the form of a rebate issued via a prepaid MasterCard, and canceling service will automatically return the iPhone to full price. Similarly, the promotion may not be eligible in tandem with some other perks.

The iPhone X is Apple's most expensive iPhone to date, starting at $999 and topping out at $1,149 for a 256-gigabyte model — more than some Macs. This is mainly because of its edge-to-edge, 5.8-inch OLED screen, but also because of its 3D-sensing TrueDepth camera used for tasks like Face ID and animoji.

Apple is expected to launch two OLED iPhones later this year, sized at 5.8 and 6.5 inches. It's not clear how much they'll cost, but a 6.1-inch LCD model should serve as a more affordable alternative.