Samsung's rumoured Galaxy S5 Mini may have been outed, as a user agent profile for a mystery handset from the Korean firm is in circulation online, Digital Spy said.

GalaxyClub claims to have obtained information from Samsung's servers about a device dubbed SM-G750, believed to be a codename for the downsized flagship.

Specs details for the phone were included in the leak, with a 2.3GHz quad-core processor and a 720x1280-resolution display listed.

Samsung's Galaxy S4 Mini featured a 540x960-resolution screen, suggesting that its successor could offer a high pixel density.

The handset is said to be running Android 4.3 Jelly Bean during testing, but this is expected to be upgraded to Android 4.4 KitKat before it sees the light of day.

Samsung is expected to announce the Galaxy S5 Mini after the full-sized model goes on sale on April 11.