When it comes to sound reception outdoor video reording is not good even through mic, when compare to redmi 3
redmi 4 has 20% more battery life, it takes around 2.5 hrs to completly charge, but quick charging is not enabled.
when it comes to RAM managment its better but you will get only 2gb out of 4gb when you kill all the apps
I have been using this mobile for last 7 days, there are no heating issues.
camera quality is better than redmi 3, and color accuracy is good even in artificial lighting.
fastness when using multiple apps is good and there are lagging using issues as far as I concerned
so, redmi 4 look and feel features are also good and the design part I liked the most
finally redmi note 4 is a value for money and its best mobile under the budget