Samsung Galaxy S4
The Samsung Galaxy S4 remains a top option at AT&T though it probably won't be that way for too much longer. While the Galaxy S4 is the best Galaxy smartphone out on the market right now, rumors put the Galaxy S5 launch in March. So, come March, the Galaxy S4 will drop in price and probably drop off this list.
For now, the Galaxy S4 is the best Galaxy smartphone that money can buy and frankly, one of the best smartphones that money can buy. Its hardware has carried over well and its software is only going to continue to improve thanks to Samsung's lengthy software support. Best of all, its price is extremely cheap through third-party retailers.