The rumor has that Sony is prepping a new Xperia handset, in the Z series which is codenamed Dogo (C550X). The new handset will probably be called Xperia ZR. It’ll supposedly be somewhere between existing Xperia Z and ZL, offering best of both worlds. Just like Xperia Z, Xperia ZR may come with water and dust resistance which will be upped. According to XperiaBlog, the Xperia ZR will have IP55/IP58, higher than IP55/IP57 of Xperia Z. It’ll also borrow the glass body from Xperia ZL. The Xperia ZR should come with 4.6″ 720p HD display, a quad core Snapdragon S4 SoC clocked at 1.5 GHz, 2GB RAM, 8GB internal memory with microSD slot and 2300 mAh battery and of course a 13 MP camera with ExmorR sensor.