How to force a factory reset or hard reset on Coolpad devices

Coolpad TipTop mini Coolpad TipTop mini
Coolpad TipTop 3 Coolpad TipTop 3
Coolpad Roar 3 Coolpad Roar 3
Coolpad Sky 3 Coolpad Sky 3
Coolpad Catalyst Coolpad Catalyst
Coolpad Cool1 Coolpad Cool1
Coolpad Roar Plus Coolpad Roar Plus
Coolpad Sky 3 Pro Coolpad Sky 3 Pro
Coolpad Cool Changer 1C Coolpad Cool Changer 1C
Coolpad Cool Changer S1 Coolpad Cool Changer S1
Coolpad Power Coolpad Power
Coolpad Fancy 3 Coolpad Fancy 3
Coolpad Fancy Pro Coolpad Fancy Pro
Coolpad TipTop N1 Coolpad TipTop N1
Coolpad TipTop N1S Coolpad TipTop N1S
Coolpad Sky 3 S Coolpad Sky 3 S
Coolpad Power E580 Coolpad Power E580
Coolpad 5380CA Coolpad 5380CA
Coolpad TipTop N2M Coolpad TipTop N2M
Coolpad Canvas 4G Coolpad Canvas 4G