No. Micromax Canvas 1 does not support fast charging.
No. Micromax Canvas 1 does not have any heating issue.
Yes, since Micromax Canvas 1 runs on the latest Android 7.0 OS - there is multi windows support.
No. Micromax Canvas 1 does not have hybrid sim slot. It has got 2 dedicated slot for the sim card and 1 dedicated sim card for the MicroSD card.
Micromax Canvas 1 comes with 2500 mAh Li Polymer battery which offers talk time of up to 7 hours and almost 180 hours of standby period.