Afraid this doesn't answer your question - but I have Vodafone mobile broadband for the same price providing 3GB per month data transfer. It's fairly slow but the coverage is generally excellent. A friend has recently bought T-mobile mobile broadband and it seems to be faster than mine, but the service and coverage has yet to be proven. He tried to persaude me to change to T-mobile, but for the moment I'll stick with Vodafone.