Instructions to reset, factory reset, factory reset or restore nubia devices

nubia Z17 mini Standard Edition nubia Z17 mini Standard Edition
nubia Z20 nubia Z20
nubia N1 Lite nubia N1 Lite
nubia N2 nubia N2
nubia M2 nubia M2
nubia M2 Lite nubia M2 Lite
nubia Z11 miniS nubia Z11 miniS
nubia N1 nubia N1