Just tweaked on the Samsung's official server, a new unofficial device by the model SM-G750 which will probably be headed towards AT&T.
After receiving information about the device, we've figured out that the device will pack a 720p display with a 2.3Ghz processor which clarifies the presence of Snapdragon 800.
Other than above, the device will have the Android JellyBean 4.3 but that can only be said in rough which might change at the time of launch.
We're trying to gather more information to keep you updated, till yet that's all we could possibly fetch. The device might be named as Galaxy S5 Neo or Galaxy S5 mini but we're not sure as the device is still in the manufacturing phase.