No. Comio C2 does not have the fingerprint scanner.
Comio C2 has micro size slot for sim cards.
It takes about 4 hours to fully charge the Comio C2. That is because it has huge 4000 mAh battery. If you use any good quality fast charger - the charging time can reduce by almost 35%.
Yes, Comio C2 does have the memory card slot.