Carriers in the United States race each other in offering great deals on some of the most expensive flagships available on the market. Not long ago, T-Mobile announced a BOGO (buy one, get one for free) deal on the Samsung Galaxy S8 and S8+, while LG had a similar promotion on the G6, which was quickly pulled for reasons unknown.
Sprint has an entirely different promotional offer, which targets Apple fans rather than Android users. The carrier recently launched a BOGO deal on the iPhone 7, but it's only available for customers who want to lease the phones instead of buying them.
Basically, you can buy an iPhone 7 and pay $27.09 per month, and receive a second iPhone 7 for free (after bill credits). Keep in mind though that at least one the two Apple smartphones must be activated on a new line.
Lease an iPhone 7 (32GB) for $27.09/mo. and get a second iPhone 7 (32 GB) $0/mo after $27.09/mo service credit. Reqs 18 month leases with 2 new lines of service or 1 new line and 1 upgrade. For well-qualified customers with 18-month lease on Unlimited Freedom plans. Early termination results in remaining balance due. Credit applied within 2 invoices.
As mentioned, you won't be purchasing the iPhone 7 devices, so you'll have to use the 18-month lease option made available by Sprint. Also, both phones must be on Unlimited Freedom plans, and you're allowed to switch to a newer iPhone after one year. Obviously, you'll have to return the iPhone 7 when you upgrade to a more modern smartphone.