T-Mobile's $20 per month iPhone 6S is a good deal if you like T-Mobile

T-Mobile's new iPhone 6S deal is a good one, but only for certain customers.

T-Mobile CEO John Legere announced a new deal for the iPhone 6S called Lifetime Coverage Guarante, in a blog post published to T-Mobile's site Thursday morning. The headline figure was a $20 per month deal on the 16 GB iPhone 6S and, after 18 months, the user has the option to pay $164 to own the phone.

With this deal, the 16 GB iPhone 6S costs just $524, which is $125 less than paying for the phone outright. What's more, T-Mobile will unlock the phone for the customer if he or she isn't happy with the service. Read more...