Even after the $10 a month hike in price, Sprint crows that its unlimited plan is still cheaper than T-Mobile’s $80 unlimited offering. And of course, AT&T and Verizon do not offer unlimited data.
If you’re a qualified Sprint customer, turn in a working smartphone and pick up the 16GB Apple iPhone 6s for $15 a month. The Apple iPhone 6s Plus is $19 as month with that same trade-in offer. If you trade-in an Apple iPhone 6 or an Apple iPhone 6 Plus that you own in full, you can get the 16GB iPhone 6s from Sprint for $1 month or the 16GB Apple iPhone 6s Plus for $5 month. Combine that with the $60 Unlimited Plan, and you can have unlimited data and a 16GB iPhone 6s for $61 a month. Keep in mind that you are trading in a fully owned phone for a leased iPhone 6s or iPhone 6s. The lease expires in 22 months and at that time, you will have to either return the phone, upgrade it for the next iPhone model, or pay to purchase the handset.
source: Sprint