My primary credit card registered to Samsung Pay gives me cash back. Never looked into the new rewards program. It works pretty much everywhere since the phone communicates with the head on the card swiper. I've even used it at places where the checker says "We don't have that." and is totally surprised by the transaction.

Apple Pay requires special equipment and I haven't run across any places that use it.

I also have the Chase app installed and get immediate notification of the transaction as well.