Mobile Working Experiences

How many small businesses have found that it is beneficial to sign up to one of the business tariffs offered by the main operators as opposed to sticking to using your personal tariff? what advice have you received?

And when your contract period expires - how many people are happy to remain out of contract? you miss out on the latest upgrade but it means you can switch at anytime.... any thoughts?

I am increasingly convinced that a lot of small businesses could save a load of cash by managing their mobiles differently - but I am not sure that the operators are actively promoting where you could save money (after all - why reduce their income from a good customer!)

Anyone got any tips for how to manage mobiles if you run your own small business?