Phone is simply beast, it runs whatever you throw at it. Look wise 4 out of 5 as volume button is at back. Touch is very responsive, screen 5.5, viewing angles are good. Generally 1.51gb is always free out of 2.8gb ram and also depends on background process.
3 gb Ram is quite a lot. Played some heavy games like fifa 2016, asphalt, GTA etc no lag at all but eventually gets hotter which is normal as octacore processor.
Camera is good, especially in low light but front camera recording is not supported by default software which could be done by third party software(not tested).
Battery is good, 3000mh which last for 1 and half day on moderate usage. Out of 16 gb, 10 gb is generally available for usage with 128 gb expandable which is more than enough.
Sound quality is good and moderate loud. Otg is supportable . Android version is 5.0.2 .
Pros-
3 gb ram
expandaple upto 128 gb(can go on upto next generation)
Octacore processor
5.5 screen
camera(low light) is good
double tab wake up feature(almost forgot to use power button) is excellent, User friendly ui.
4G both sim
Battery is removable
Cons-
No finger sensor
No default front camera recording(can be supported by 3rd party software not tested)
volume button at the back
no earpiece, must be included
Although for this price, excellent phone, GO FOR IT.