But even the GSM phones can't all share information. Users within a single European country often cannot send each other text, or SMS, messages via their mobiles because different carriers use different protocols. Mobiles and PDAs also are divided by an interoperability gap. M-commerce must operate the same way anywhere in the world. He says mobile and PDA manufacturers are beginning to work together to settle on standards that will eliminate the problem.
Mobile security is also an issue.
It's accomplished in the form of small programs or digital certificates that identify the user and generate digital signatures. Send it . Use this version. E-mail this to a friend. Wired Digital Inc., a Lycos Network site.