Both rear and front camera of 13MP has f/2.0 aperture.
Yes, Tecno Camon iSky 2 does have the face unlock.
Yes, Tecno Camon iSky2 has a dual rear camera set up. The primary rear camera is of 13MP and secondary rear camera is of VGA resolution.
Yes, Tecno Camon iSky2 does have the fingerprint scanner and also has face unlock function.
Tecno Camon i Sky2 comes with 5V / 1.2A output power charger.