Jio Phone 2 does have the 4GB internal memory. Practically, it has unlimited contact book.
Yes, Jio Phone 2 comes with JioTV app. You can watch 400+ TV channels live.
Yes, Jio Phone 2 comes with pre-loaded FM radio. You can even record songs which are broadcasted on FM radio.
No. You cannot use the 3G network on Jio Phone 2. You can use the 4G network and 2G network.
Yes, Jio Phone 2 does support the Malayalam language.