Three UK now charges 1p/MB, 2p/SMS, 3p/min
 

Three UK has just launched a new prepaid tariff. It charges 1p/MB for data, 2p for UK SMS and 3p/min for UK calls. With every top-up, you get 150MB of data for free. If you click on the above link and then "See how we compare", there's a very useful comparison of most of the UK's prepaid tariffs.

I know several Three customers who frequently experience coverage problems, even in London, but they say that when they do have coverage, the quality of the data connection is excellent.

Three's charges for international voice calls remain extortionate though, for example 56p/min to the US.

But they do also have alternate much cheaper rates for many popular destinations (USA 3p) when direct-dialled with their 3 digit prefixes

And they allow some prefix selected callthrough operators with similar rates

@Andy, Just to clarify... I could call the US from London for 3p simply by dialing 424 and then the number. I'm assuming that for the US it would be 424 001 area code + phone number. Correct?

Correct.

Save on PAYG international calls. - Calling & messaging international numbers - Roaming & international - Support - Three

Just back from London. Three UK worked like a dream. Excellent service all over London. Faster internet speed than I have with AT&T in the US.