No. Micromax Canvas does not the Gyroscope sensor.
Yes, Micromax Canvas Infinity is a true 4G VoLTE phone.
It takes about 2 Hours to fully charge this phone. However, you can use Sony CP-AD2 fast charger to charge this phone in almost half time.
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 change fonts in Micromax Canvas Infinity.