A method is described for providing wired line telephone and mobile telephone cross-usage comprising the steps of de-activating call forwarding of incoming mobile telephone calls to a subscriber's home wired line telephone and for activating call forwarding of incoming wired line telephone calls to the subscriber's mobile telephone upon removal of the mobile telephone from a customer premises equipment (CPE) cradle. The method further provides for activating call forwarding of incoming mobile telephone calls to the subscriber's home wired line telephone and for de-activating call forwarding of incoming wired line telephone calls to the subscriber's mobile telephone upon placement of the mobile telephone into said CPE cradle. A customer premises equipment (CPE) cradle for providing home wired line and mobile telephone cross-usage has a conventional wired line telephone jack, an AC in plug/port, at least one connector pin, at least one charging pin, a detection switch, a support for the mobile telephone, a display and buttons unit, a charging mechanism, a detection switch and a programmable module.