Aside from Sony rumoured to be exploring OLED display for future devices, there might be two new smartphones coming out sooner than that. According to user-agent profile (UAProf) from Sony, the two Xperia phones will be powered by a MediaTek Helio P20 MT6757. This chipset combines a 2.3GHz quad-core and 1.6GHz quad-core processors with Mali-T880 graphics. The phones’s model numbers are G3112 (G31XX) and G3221 (G32XX). The G3112 is said to be using a 720p HD display, while the G3221 will have a 1080p Full HD display. There isn’t that much else we know but MWC is just around the corner and it’s expected we’ll see these devices there.
Source: Xperia Blog