Sony Ericcson designed mobile phone for gamer called PSP Mobile Phone. This phone can be enabled to Playstation Portable, joystick for Playstation available here, it just like that both of them combined to a device. The gadget also doesn't lose its primary function as a cellphone, MP3 Player, Internet connection, TV Station, GPS receiver, and other supported features available in this stuff. Even the Playstation Portable is in the mobile phone, it will not feel much different, because this 2 in 1 gadget created with detail texture and technology.
source : tuvie