Yes, Eluga A3 does have a gyroscope sensor.
Yes, Panasonic Eluga A3 is a metal body phone.
Panasonice Eluga A3 comes with 5.2 Inch HD IPS display with 1280 x 720 resolution which produces 282 PPI resolution. It has Asahi Dragontrail Glass which provides protection against scratches etc.
Yes, Panasonic Eluga A3 does have a hybrid sim slot.
Eluga A3 does have 3GB LPDDR3 RAM.