Citibank is offering $10 back for using its MasterCard with Samsung Pay. To qualify you need to activate Samsung Pay application on your Galaxy 6 or Galaxy 6 Edge phone, add one of the Citibank MasterCards as payment methods and use application to make a transaction of $10 or more by 12/19/2015.
Using Samsung Pay is very easy and the charge terminal does not have to be any special. Just put you phone next to magnetic strip reader of the charge terminal swipe your card on the phone and you all set. Much more convenient and does not require special equipment on the merchant side.
Supported Samsung devices and Bank Cards can be found at Samsung Pay Support page.