Even though the rumor mill speculates the South Korean phone maker will launch a premium Galaxy S5 variant called Galaxy S5 Prime, it seems that the new handset will be actually called Samsung Galaxy F.
Soon after the announcement of the current Galaxy S5, Samsung's JK Shin has denied the rumors of a premium Galaxy S5 variant. Why? Because he wanted to protect the Galaxy S5 sales (customers might have waited for the Prime version), or because the alleged Galaxy S5 Prime will not be a Galaxy S5 variant. Previous rumors have suggested that Samsung is planning to give birth to a whole new line-up of premium smartphones called Galaxy F.
The well-known leaker @evleaks received the photo of an alleged Samsung Galaxy F from an anonymous tipster. The same tipster claims that the Samsung Galaxy F will be officially introduced during an "Unpacked Ep. 2," and that the new handset will replaced the next-gen Galaxy S flagship, namely the Galaxy S6.
If the report is to be believed, the Samsung Galaxy F would feature a 5.3-inch Quad HD (2560 x 1440) screen while being underpinned by a quad-core Snapdragon 805 SoC, which is the most powerful chipset to leave Qualcomm's factory gates in 2014.
The tipster even provided a photo of the Galaxy F. A low quality one, it's true, but it allows us to see that it has way thinner bezels and a metallic finishing for the case. It's very hard to say if it's just a plastic case with metallic finishing or real metal, but most reports seem to indicate that the handset will be made using the latter material.
Anyway, there's no way to verify the veracity of the report, therefore we are advising you to take it with a pinch of salt as nothing is official until Samsung says so.