Currently the most popular type of phone for business cellular use has been a type of Smart phone. The Motorola Q has been such a phone. Now AT&T offers a newer version called the Moto Q9 "Global."
This is a thin multimedia smart phone with QWERTY keyboard, GPS, Word, Excel, Powerpoint, Bluetooth Wireless, and much more. The Q Global includes the latest Windows Mobile 6.0 OS, and capabilities for configuring corporate email accounts.
As the Mobile name implies, the Motorola Q is also a favorite choice of international business travelers who need business cell phone functions while overeas.
For more detail or to order A Moto Q Global ( currently available for under $50 with an AT&T Wireless agreement) see:
ATT Motorola Q Global Phone Information
