Deal: Buy a Samsung Galaxy S6 or Note 5 from AT&T, get another S6 for free
It looks like the deal includes not just the regular Galaxy S6, but also the rugged, water-resistant Galaxy S6 Active, the Galaxy S6 edge, Galaxy S6 edge+, and even the Galaxy Note 5 - you can buy any of them, and get a 32 GB Galaxy S6 or Galaxy S6 Active for free. To qualify for this offer, you must get both smartphones on AT&T Next with qualified service of at least $70 per month. The offer will end on March 31, and, for some reason, it's "void in Connecticut, Rhode Island, and Miami-Dade." Anyway, make sure to read the full Terms & Conditions at AT&T's website (the second source link below).
The Galaxy S6 and Galaxy S6 Active are still running Android Lollipop, but Samsung will soon update them to Android Marshmallow. In case you want to know more about the two handset, go ahead and read our Samsung Galaxy S6 review, and our Galaxy S6 Active review.
source: AT&T, Terms & Conditions