Yes, Eluga A3 does have a gyroscope sensor.
You can use one micro and one nano sized sim card in Eluga A3.
Yes, Panasonic Eluga A3 does have a fingerprint scanner.
Panasonic Eluga A3 does come with Fast charger. To get the fast charging, you need to use the company provided charger.
Yes, Panasonic Eluga A3 is a metal body phone.