Some predict that the cellular phone will completely take over, and wirelines will hardly be used by the year 2010. With the expansion of the wireless lines area codes that distinguish between states will also lose importance.
First there are a couple changes that the wireless industry must make. Reception and coverage areas will increase. This way making long distance phone calls from all over the world will be possible without interruption. Technological advancements such as TDMA, CDMA, and GSM already provide clear calls.
Calling restrictions on time will no longer exist so that calls can be made at any time conveniently. More efficient networks that require fewer costs will allow carriers to offer only unlimited calling plans.

 
What's next?
The cell phone will feature large address books, and calendars. There will be increased internet access ability with DSL and Broadband. Cell phones will also have the capability to store files and documents. They will have video-conferencing capabilities and multiplayer games. It will even be possible to set appliances with your phone, such as the dishwasher.