I looked at the web site and it sounded interesting but confusing. Maybe I just couldn't find the right help page there (and I looked at the FAQ), but I still don't understand:

1. If you have or buy an unlocked phone and get a Sim4travel Sim card, then that card gives you a phone #, right? So where is the phone number resident, in the UK, so that anyone who calls you has to call a UK number? Or can you get a number in other countries?
   
2. Supposedly you "pay as you go." Does this mean it's impossible to be charged more than you've prepaid -- e.g. no "surprise" huge bills run up because you forgot to turn off the phone or because while in your pocket some random buttons got pushed resulting in a twelve hour call to a repeating "The time is now..." line in Borneo?
   
3. It's a UK company and charges are in pounds -- can you join from outside the UK?

(I know I could probably call or email them, but I thought I might get quicker and better information from someone here who has used them.) Thanks for any comments.[/QUOTE]

1. It is a UK 44 number and that is the only number offered.
2. It is pay as you go and when your credit is up, so is the service.
3. Yes you can get the card shipped anywhere. But I don't recommend this card. See red line.