Yes the device has  Google assistant feature.Oppo Find X

It's all about your budget selection,F7 is best in under 25k.. Although Vivo X21 has a inbuilt fingerprint scanner which is new.. But if you are spending  35k for your selection then wait for Oppo's upcoming flagship phone Oppo find x Which has the all new Qualcomm snapdragon 845 Soc & the lifting camera setup which is beyond of craziness.

The biggest problem that you might face with Samsung Galaxy Note 9 is it single sim support. 

No,  Samsung Galaxy Note 9 has a non-removable battery.

Yes, Samsung Galaxy J8 2018 has an LED notification light.

Bth are good
But i will recomend 4/64

I believe Redmi 5A is better than Infinix Hot 4. It offers a better processor and amazingly better camera. It also has a better screen resolution.

Oct 2018

Normal contents in the box

Out of 32GB internal memory, there is around 23GB for user to install apps.

Once you start a call, there is an option of recording the calls. Tap that and your call shall be recorded and stored.

Xiaomi redmi note 5 pro because snapdragon 636 procesor and 20 MP front camera

Yes, there is a 4GB RAM variant. 

Yes,  3D facial recognition...