Three

[Glenn]

Voted the best UK network
http://www.reghardware.com/2010/10/28/three_best_in_yougov_survey/

[Rik]

Strange, I've never really had problems with Orange, and now with the T-mobile roaming, should have even less. I wouldn't tend towards Vodafone, based on user reports I've had.

[Glenn]

I wouldn't have thought Three were the best either, and I indirectly support them at work.

[Rik]

No mention of O₂ either...

[Technical Ben]

I always had good signals with o2. But then again, I bought proper phones compared to most.
I always heard vodaphone had the best network coverage, but that only ever came from their own employees. 

[Rik]

The one place I know it was true, Ben, was on the Norfolk Broads.

[Gary]

Vodafone has great coverage around here, and great big prices as well.

[Rik]

I do like a big price, but only if I can eat it.

[Gary]

I do like a big price, but only if I can eat it.

[Niall]

I wouldn't have thought they had the best, and to be honest I wonder how they come to these conclusions. That being said, around Wrexham they are slightly better coverage wise than Vodafone, who have pathetic support. 3 support however is in India and has more than it's share of issues, although they don't lie to you, so I'd say they were the best out of the bunch purely based on that.

[pctech]

I think Three now has the largest coverage but when it comes to customer service, forget it.

[Niall]

The one thing I would say about Vodafone, T-mobile and 3 is that their websites are shockingly bad. They really need to work on those, especially in this day and age where more and more people have internet access and would rather use the website rather than call customer services. The sites either don't load, are slow to load, have errors on them, have dead links or are awful to navigate.

[pctech]

O2's is pretty bad too.