Can anyone recommend a provider for business. I have been with O2 for several years, but they are starting to drive me insane now, although I have the feeling there is nothing better, as the other providers I used before them were worse.

Here is my recent saga to give you an idea: http://russmichaels.uk/2016/01/o2-phone-doom/

im sure it will depend on your area, for me ee is the best in county durham and three is the worst but im sure that wont be the case every where