The communications business is an area of commerce that is very hard fought and ever changing, and many people are often asking what is the best business mobile phone. The truth is it is difficult to answer that question with any definite certainty, as different users have different needs, and different handsets also give different performance and functionality.
Looking at what you require is the best way to start: in all businesses the methods of communication are varied – you need to access and send emails, make calls, and very possibly use an instant messaging service, and the best business mobile phone for all of those functions may not be the one that is most obvious.
For instance, many people are adamant that the Blackberry Storm is the best in the mobile phone business and this is borne out by the loyal following that this excellent device has; others will side with the Apple iPhone, but it may not be as directly aimed at the commercial user as the Blackberry most certainly is.
To ask to find the best business mobile phone is to ask something that is bordering on the impossible; the most sensible thing to do is to compare all different models and find the one that you want.