Wireless systems have the unique capability of maintaining the same contact number even if one moves from one location to another. This has made them increasingly popular. The wireless telephones are not only convenient but also provide flexibility and versatility. There has been growing number of wireless phone subscribers as well as service providers. A combination of wireless communication and computer technologies has revolutionized the world of telecommunications. Wireless and mobile communications have found usefulness in areas such as commerce, education, defense, etc.