Nokia 6.1 Plus does support NFC(Near Field Communication) to share content with other NFC enabled devices but not wireless charging.
You can see detailed specs here: Nokia 6.1 Plus
Watch the review here:
Yes, Nokia 6.1 Plus supports OTG. USB OTG or USB On-The-Go is one of the most recent technologies that allows you to connect your pen drives and in some cases hard disks to your smartphones and tablets. It has a cable and through that cable, you can directly view and use your pen drive in your smartphones.
You can find the specs of Nokia 6.1 Plus here: Nokia 6.1Plus
Yes,Nokia 6.1 Plus supports VoLTE in both the SIM slots since VoLTE works on bands 3,5 and 40 and both the SIM slots in Nokia 6.1 Plus supports band 3 and 40. You can use two Jio SIMs at a time in Nokia 6.1 Plus.
Specs : Nokia 6.1 Plus
Xiaomi Redmi Note 6 Pro has actually got some better features as compared to Nokia 6.1 Plus and can save your money too as it cheaper. In comparison to Nokia 6.1 Plus, Xiaomi Redmi Note 6 Pro has a bigger display, higher resolution front camera, and bigger battery capacity.
Check out this interesting comparison by 91mobiles: Nokia 6.1 Plus vs Xiaomi Redmi Note 6 Pro
Nokia 6.1 is a lot costlier than Honor 7A, however, it completely justifies the cost. Nokia 6.1, in comparison to Honor 7A, has a higher resolution display, faster processor, higher resolution rear camera and fast charging support.
You can see the detailed comparison here: Nokia 6.1 vs Nokia 7A
The Xiaomi Mi A3 wins here with some better specifications over Nokia 6.1 Plus. With Better Battery, Processor and Camera, the Xiaomi Mi A3 seems to be a better deal. But Nokia 6.1 Plus has a much better display. So the choice is yours.
Check Full Comparision: Xiaomi Mi A3 vs Nokia 6.1 Plus
Check Xiaomi Mi A3
Check Nokia 6.1 Plus