I've been using Voipstunt for computer calls from Thailand. When my credit ran out they only gave me the option of paying by methods solely available in the UK, not even by Visa card, with which I made the initial payment of €10.
Voipbuster and Voipdiscount, all Swiss-registered companies, are the same. Even opening a new account entails answering your UK home phone with a security code to verify your ID, although they do accept Visa for the first top-up. This is all quite ridiculous and I will not deal with these Swiss timewasters any more.
Does Skype let you pay by Visa card without calling your home number for verification? Any other good Voip providers you can recommend? Many thanks.