Yes, Micromax Canvas Infinity does have the support for OTG. You can attach pen drives easily.
No. Micromax Canvas does not the Gyroscope sensor.
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 the multi screen functionality.
Yes, Micromas has just confirmed that they will release the software update for the same in short time.