Ive been using this mobile for almost two years now and I am very happy with the purchase. Its slim and stylish and at the same time its sturdy and durable. I like the design of Sony Xperia mobiles in general and E3 Dual is from the same lineup. I bought the black color one and it has a premium look and feel to it with matte finish in the back. Primary camera quality is very good, has many options and settings. Front camera is okay but not that great. Music playback is amazing! The sound quality is as good as Dolby Atmos in Lenovo phones. A good pair of headphones will be a great companion for music lovers. Regular software updates from Sony are also very good, making the user experience better and better. Performance is great and theres just one bad thing in the mobile that is the available internal memory is very less and we cant install a whole lot of games and apps but at the same time we can move the apps to SD card and supports up to 32Gb. Video playback is really smooth and never had an issue with it. Dual SIM works fine, call quality is also good. Best thing is, this phone hardly had and crashing issues like many other mobiles and the battery backup is good too; easily lasts a day or two with single charge depending on the usage.
I would recommend buying this phone but bear in mind that this has low available internal memory.