The term 'Galaxy S5 Prime' refers to one phone that sort of exists, and another that never saw the light of day
In the wake of the Samsung Galaxy S5's launch in early 2014, there were rumors that the 5.1-inch GS5, with its 1080p display, wouldn't be the only Samsung flagship to launch in 2014. This "Galaxy S5 Prime," analysts suggested, would ship with a 5.25-inch 1440p display, 3GB of RAM and more internal storage. In the months that followed, benchmark leaks seemed to suggest that such a device was indeed in development. (And as has been rumored for just about every Samsung flagship, whispers of premium aluminum-based construction started to emerge too.)
The story of the Samsung Galaxy S5 Prime is a little complex, with the "Prime" monicker never actually used for any actual retail product. Instead, the name is generally used to refer to two Samsung handsets — one available now in the company's home market, the other rumored phone that never materialized.
The Samsung Galaxy S5 Broadband LTE-A
As the months led on, it became clearer that the reports of a "Galaxy S5 Prime" actually referred to at least two different devices. The first, the Samsung Galaxy S5 Broadband LTE-A launched in South Korea in June 2014, packing updated internals and display tech in a Galaxy S5-like body. The GS5 LTE-A (SM-G906) brought support for faster LTE networks along with an updated processor — Qualcomm's newer Snapdragon 805 — with 3GB of RAM and an all-new 1440p SuperAMOLED panel at 5.1 inches. On the surface at least, this seemed to be the GS5 Prime we'd been hearing about for the past several months. The only problem? It was a Korea-only product.
The Samsung Galaxy F
Separate to the Korea-only GS5 LTE-A, in late Spring reports started to emerge of another high-end Samsung phone in the works, this time with specs closer to the original Galaxy S5 Prime rumors. The Galaxy F, as it became known, was said to pack the same high-end internals as its Korean cousin, but with a larger display size of around 5.2 inches, and the potential for a wider international launch. Leaked images seemed to show a device around the same size as the existing Galaxy S5, but with much slimmer bezels and a new battery door pattern. Thanks to leaked renders we got to see this unannounced handset in a variety of colors, including black, white and gold.
Then, curiously, things went quiet. Samsung never released the Galaxy F, instead kicking off its late 2014 portfolio with the Galaxy Alpha and Galaxy Note 4. The fate of the phone is unclear, but it's possible Samsung instead decided to focus engineering effort on its next real flagship phone, the Galaxy S6.