Sprint offers free Samsung Galaxy S6 lease with new Unlimited Plus plan
While you are leasing your handset instead of owning it, after one-year Sprint will allow you to exchange it for the latest model. Since Sprint is making your lease payments, you will continually be able to use the hottest new handsets every year on the house. For $200, a family of four can each receive their own free Galaxy S6 (again, leased) and unlimited talk, text and data for $200.
If you want the 64GB or 128GB models, you will have to reach into your pocket to make up the difference between the price to lease those handsets over 24 months, and the $20 that Sprint is giving you monthly to cover the lease. That also applies if you want the Samsung Galaxy S6 edge. You simply need to cover the difference between the monthly lease for the Galaxy S6 edge and the money Sprint is giving you.
Since you are leasing the handsets, keep in mind that they need to be returned in working condition. The Sprint Unlimited Plus Plan is available for well-qualified customers only.