I am using this phone since 3 month, it is best ever phones under 10k. Best part of these phone is you never gets bored because of most usefull and simple user interface. ( MIUI 8.5) now it is ready to rock on update 9n miui 9. It has very long lasting battery performance with 4100mah, one should never ever gets worried about battery who has using redmi 4 smartphone. Phone looks premium , solid bar and stylish.
Cons.-
These phone is made onley for one who use normal tasking in day to day life, it is not heavy performer phone.
Camera performane is average , I got face issue with these phone is display problem
Yellow colour of line is appears on display , I dont know why but dont worry about it u will get new display in mi care center as I got new one.
And normal heating issues are appeared during charging and video calling.
Slow motion camera setting is not available.
Overall redmi 4 is best phone with smaller display. One who are looking for phone under 10k or budget phone for normal usage then this is the perfect choice for them.
Thank you.