Yes, you can use 2 4G sim cards in Comio C2. But at any given time only one sim card will work on 4G network.
Yes, Comio C2 does have the front camera flash.
No. Comio C2 does not have the fingerprint scanner.
Yes, you can use the 4G Jio sim card in Comio C2.
No. Comio C2 does not have the Gyroscope sensor.