Abstract: Changeable displays are described and methods of making and using such displays are described as well. Displays can be made changeable using wireless communications, including through cellular indications networks. GSM modem technology can be used. A changeable display can incorporate a GSM modem incorporating a programmable SIM card, which may be programmed with a cellular telephone number for remotely accessing the display. An I/O unit may be included to interface between the modem and a visual display. An edge lit display is also described along with its method of manufacture.