We have a winner! http://www.piranha-mobile.com/ let's see: Hungary 16 cents a megabyte, New Zealand 16 cents too ( I pick NZ because it's notoriously expensive among the developed countries -- and I don't have any relatives in Afghanistan or somesuch -- which I usually travel in). UK some providers only 8 cents. 420 days is the expire period and you can just use data to avoid expiration, no need to make a call. It has VoIP calls for 1 cents a minute. Free international shipping. Initial investment is just 12GBP (<20USD) and that has 5GBP credit.