There are now five smartphones on the market that will appeal to business and professional users, each with different strengths and weaknesses.

Our buying advice is simple:
• If you want a mobile device that takes full advantage of Web connectivity, applications, and personal media that you can also use for business connectivity such as email and calendaring, get the Apple iPhone.
• If you're subject to high security requirements, such as for regulatory compliance, need to manage lots of devices, or just can't handle using a touch-based screen keyboard, you want the BlackBerry Bold.

Apple iPhone 3GS smartphone

The WebOS-based Palm Pre was innovative last spring but has been bested by the new generation of Android devices.

The Motorola Droid's keyboard is unusable.

The BlackBerry Storm 2 was supposed to fix an unusable clickable touchscreen in the original version, but the solution doesn't address the core issue: Tapping is very slow on the screen, to the point that sustained text entry is out of the question.

Windows Mobile and Nokia Symbian devices are also out of the picture. Microsoft's long-delayed Windows 7 Mobile remains vapourware, and making purchase decisions on Microsoft's promise is foolhardy.

Nokia's Symbian OS has evolved slowly in the last decade and simply isn't in the same league as modern mobile OSes; Nokia knows that and has a plan to move - over several years - to a new OS called Maemo.

Apple iPhone 3GS review

RIM BlackBerry Bold 9700 review

RIM BlackBerry Storm2 review

Palm Pre review

Motorola Droid review

NEXT: Smartphone Web and Internet support compared