The present invention relates to a method for administering the authorization of at least one mobile telephone (5) relative to a mobile communications network (8), wherein the mobile telephone (5) is design for near-field communication (7) and in case a mobile radio card (6) is not present in the mobile telephone (5), the authorization thereof takes place by an external device (1) having one or more mobile radio card(s) (10) and a device (3) for near-field communication (7) with said mobile telephone (5), and wherein near-field communication (7) takes place between the external device (1) and the mobile telephone (5) for authorizing, and a connection is permitted to be established to the mobile communications network (8) after successful authorization by the external device (5).