I have tried and tested almost many phones from different brands.
And my expert opinion is to go for Lenovo.
Lenovo is a far reputed and bigger company not only for smart phones but also for laptops, desktops, tabs, power banks and other accessories.
Lenovo launches less phones per year as compared to MI but all phones are nice in a compact package and has value for money and also fetches a good resale value.

No, Redmi 4 and Redmi Note 4 are different phones. They offer different features at different costs.

J7

Both the phones are mid level performance phone so dont expect very high level gaiming performance and for normal gaming both will serve the purpose.

It won't make any difference if you buy from Amazon store or an offline store. The warranty terms and conditions remain the same.

No, both are different phones. Though most of their specs seems to be same, but they are different.

No, Micromax Canvas unite 4 Plus has different slots for SIM and SD card. You can use 2 SIM cards and 1 SD card simultaneously.

Yes, It has a hybrid SIM Slot.

I dont know because I have this phone and I dont have any such issues. For this visit to the service center with this issue,

As the phone has not yet launched but as per the Android feature you can choose from multiple languages.

I agree to your point but recently Samsung has tweaked the performance of their phones and now there is very less lag in their phones. I am using J7 Max and its performance is amazing.

No, There is no front flash in On7 Pro.

Any one best phone pls tell

It is already launched on 21st July.

Yes

Oppo and Vivo are the best selfie phones in the market you can check Oppo F3 Plus and Vivo V5 Plus to get all the above features.

Yes iam feeling better camera quality

No it does not have a Auto call recording feature. However, you can download any call recording software and record your calls.

I am a samsung lover so would suggest for Samsung Galaxy A9 Pro  ,the phone has an elegant look and innovative device which draws the attention.it has Ample storage,Excellent cameras,Powerful batterySamsung Galaxy A9 Pro vs Sony Xperia XA1 Ultra