Yes, Micromax Canvas Infinity has the VoLTE support.
No. Micromax Canvas does not the Gyroscope sensor.
No. You will get normal charger only in the box. However, you can use Sony CP-AD2 charger to charge it much faster than the original charger.
Yes, Micromax Canvas Infinity does have a dedicated MicroSD card slot. You can use 2 sim cards and 1 memory card at the same time in this phone.
Yes, you can use 2 sim cards and 1 memory card at the same time in Micromax Canvas Infinity.