No. Comio S1 does not have the removable battery.
Comio S1 is equipped with latest Android 7.0 Nougat.
The standard packaging of Comio S1 includes - Mobile phone (with battery), USB Cable, USB Power Adapter, Ear Phone, User Manual, Warranty Card, Sim Ejector Tool, Screen Protection Film & a Free Back Cover.
No. Comio S1 does not have dual rear camera. It has single lens camera with 13MP resolution.