While there is no official confirmation from Samsung of a higher-end version of the Samsung Galaxy S5, a recent Bluetooth SIG listing of a device bearing model number SM-G906L indicates that an eventual release might be on the cards. The SM-G906L model number is said to correspond to that of the South Korean version of the Galaxy S5 Prime, a device rumored to feature at the very least a high-density QHD display.
The Bluetooth certification it itself doesn't tell us anything other than the fact that the device features Bluetooth 4.0 radios. The hardware version number REV0.1 indicates that the device is likely a test unit or a prototype.
The Galaxy S5 Prime is allegedly slated for an official launch sometime in the month of June, but considering that Samsung is holding a tablet event on June 12, it is possible that the actual launch might not be until the end of June or sometime in July.
All we have are rumors to go by, but if there is any validity to them, the Galaxy S5 Prime will be anabsolute beast of a handset, featuring a 5.2-inch quad-HD screen with a resolution of 2560 x 1440 (that comes out to a 564 PPI pixel density), Snapdragon 805/Exynos 5430 SoC, 3GB of RAM, 16 MP ISOCELL camera, LTE Category 4 modem and Android 4.4.3 KitKat. It should be interesting to see whether such a device actually sees the light of day.