In the times to come cellular users need not to worry about the compatibility of their handsets with GSM or CDMA technology. Presently, a GSM (Global System for Mobile communication) handset cannot be used in a CDMA (Code Division Multiple Access) network and vice-versa. GSM and CDMA systems are competing technologies. Currently worldwide GSM users are 870 million as compared to CDMA's 164 million. The advantage of GSM technology is its large global coverage. In near future the phones will be able to identify the technology standard being used in a specific network and tune itself to receive the signals. This is according to Mr. Arun Netravali, president (emeritus) Bell Laboratories, USA, who has around 70 patents to his credit in the fields of computer networks.