HTC One X+
HTC One X specs and price spotted. HTC

HTC's flagship One X+ smartphone has not been officially announced, but images are already circulating online, taken from a brochure that is said to come from O2 UK, according to GSMArena.

The leaked document shows the One X+ price and specs. According to the brochure, the One X+ boasts an internal storage option of 64GB, sports an eight megapixel rear-facing camera, a 1.7GHz quad-core processor, Beats Audio and 25GB of free storage with Dropbox.

The device is said to cost £479.99 on a Pay as You Go basis, and the brochure mentions that the phone may soon be available on a contract. The brochure suggests that the One X+ runs the Android 4.1 (Jelly Bean) operating system.

Pocket-lint also received pictures of the One X+ ahead of the official announcement. The site claims the pictures of the front and back of the One X+ were sent by a trusted source.

Pocket-lint reports that the design of the device is virtually identical to the One X and could sport a 4.7in touchscreen featuring three touch keys.

"Around the back the pictures indicate that HTC's charging dock points will be present and a camera positioned in the top half of the device in the centre. The shell is made from polycarbonate, our source has confirmed," said Pocket-lint.

The One X+ recently made its appearance on four benchmarks: Quadrant, AnTuTu, LinPack and Nenamark, and has reportedly scored high marks. The device is reported to score over 7,500 in Quadrant benchmark with a score under 14,000 in the AnTuTu benchmark.