Experimental mobile gateways

Abstract

One very popular mobile service available throughmost carriers, is Yahoo's 8243 service [8]. This service allows you tocheck your Yahoo! Mail, use Yahoo! Instant Messenger, or check scores,news, and so on. When you access this type of service, you are using both thecarrier's network and the service provider's network, in this caseYahoo!. There are also many carrier-dependent services, in which caseyou make use of the carrier's network alone.