Hi, I use a T mobile pay as you go dongle, I belive it is the only one that does pay as you go no other charges. Basically its £15.00 per gigabyte ,with no time limits on the use of it. coverage is good , a 3G connection around most towns & when you cant get that a gprs wherever you can get a mobile phone signal.Set up right the connection I find pretty good, speed wise, ideal for when your away on hols ect. Just make sure you set the computer up so that programs dont update whilst using it or you will quickly use up your quota.if your only browsing the internet , checking mail ect, you will be suprised how little it uses.Hope that helps you.