The detachable front flip cover comprises a flip cover and a first barrier rod. The flip cover covers a front face of the cell-phone. The flip cover comprises a first side cover portion for covering a first side edge portion, and a front cover portion for covering a front surface portion. The first barrier rod is provided along the first edge of the flip cover, and extends from the first barrier rod, and has a diameter larger than a thickness of the first edge portion of the flip cover, and is configured for being partially fitted into a first groove provided along an edge portion of the main cell-phone case so as to be received and held in place. The first edge portion and the first side cover portion are connected to each other along a line foldably so as to fit a corresponding edge of the cell-phone.