Yes, Micromax Canvas Infinity is a true 4G VoLTE phone.
No. Micromax Canvas does not the Gyroscope sensor.
Yes, Micromax Canvas Infinity does have the beautify mode for selfies.
Yes, Micromax Canvas Infinity does have the removable battery. It has huge 2900 mAh Li-Ion battery.
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.