The Sony E5663 sports a 4.6-inch display with 1080 x 1920 pixels, thus being the first Sony smartphone with a 1080p screen that's smaller than 5 inches.
Moreover, the upcoming handset has a 20.7 MP rear camera, and a 13 MP front-facing camera - Sony could certainly present it as a selfie phone. Other features seemingly include a 64-bit octa-core MediaTek MT6795 processor, 3 GB of RAM, 16 GB of internal memory, and Android Lollipop.
From the looks of it, the E5663 might be the rumored Xperia Z4 Compact. As you may know, the Xperia Z3 Compact (pictured above) features a 4.6-inch 720p display, thus the E5663 (with its 4.6-inch 1080p screen) would be a perfect successor. Of course, for now there's no way of telling if Sony is ever going to release an Xperia Z4 Compact, so it's possible that the E5663 will have a different name once it's officially announced.
The E5663 showed up on the website of Zauba - which tracks Indian imports and exports - so it could be released in India at some point.
How do you like the idea of a 4.6-inch 1080p Sony Xperia?
Some of Sony E5663's features
sources: GFXBench, Geekbench via XperiaBlog