From Sprint’s press release:

Starting today, new and upgrade eligible Sprint customers can get iPhone for just $22 per month with iPhone Forever. Anytime customers don’t have the latest iPhone, they are eligible to upgrade. They bring their iPhone, upgrade on the spot and away they go. […] Qualified customers can get a 16GB iPhone 6 model at Sprint branded retail stores, Sprint.com, 1-800-Sprint-1, Best Buy and Target.

They’re also offering a promotional rate of $15 a month (instead of $22) until the end of the year for customers who are willing to trade-in their current smartphone. It’s a pretty compelling deal and something worth considering if you live in an area with great Sprint coverage. But as G. Keenan Schneider points out, you don’t see them making this offer for the latest Android phone.