Sony has added another midrange phone this 2015 with the announcement of Sony Xperia E4 and Xperia E4 dual.
Both the Xperia E4 and Xperia E4 dual have identical specs except for the latter which has dual sim capability. Both have 5 inch IPS qHD display, running on Android 5.0 Lollipop, powered by a 1.3 GHz quad-core processor with Adreno GPU, 5 MP rear camera with flash, 2 MP front camera that can shoot HD videos, 3G connectivity, A-GPS, Bluetooth 4.1, 1 GB RAM, 8 GB ROM, WiFi and 2,300 mAh battery.
The promo video at the Sony Xperia Youtube page said that it also has stamina mode which can go up to 2 days battery life. No official info yet on it's international price.