No. You cannot use the 3G network on Jio Phone 2. You can use the 4G network and 2G network.
Yes, Jio Phone 2 comes with JioTV app. You can watch 400+ TV channels live.
No. Jio Phone 2 does not have the auto call recording.
Yes, Jio Phone 2 does have the Google Assistant in-built.
No. Jio Phone 2 does not have the front camera flash.