A Sony Xperia M4 Aqua is expected to join the Xperia Z4 Tablet at the MWC announcement and though that's not for a couple of days, the phone couldn't elude the paparazzi any longer. Two photos show a classic Xperia design with a lot of similarities to the Xperia M2 Aqua. The phone is most likely the Sony E2303 that has leaked before, which would mean a 5.2" 720p display, Snapdragon 615 chipset running Android 5.0 Lollipop and a 13MP main camera and 5MP selfie camera, both shooting 1080p video. Benchmarks unfortunately can't tell us the IP rating, but the Xperia M2 Aqua has IP68, making it dust tight and able to survive dives up to 1.5m for half an hour. Thanks to the CoolKid for sending this...
Source: http://www.gsmarena.com/sony_xperia_m4_aqua_spotted_before_its_official_unveiling-news-11348.php