As I am a fan of SONY brand because of its qualities of product that make customers always satisfy.
In my xperia m4 I found everything that I want but there are some small issue with phones that I face.
Heating issue: Upper part of phone heat too much but this problem is face only in summer season. But the device is not heated on normal use.
Camera: Front camera of phone is not good or up to mark in low light.
Only these are some issues or drawback of this device.
If we overall saw the performance of device is supercool and all games available on playstore are easily or smoothly run on this device.
The best part of the phone is that it is fully waterproof . I test phone by dropping five - six time in full bucket of water to showoff in friends and the device never disappoint me.
I gave 4 star to this because of heating issue and front camera