I ask you, what do you think?
Recommended to me but I'm not sure...
http://www.simstogo.co.uk/ (code +4478722 Cloud9)
My favorite sim and VoIP for roaming in Europe and worldwide:
UWT-mobile and Xxsim: for call+sms in Europa extern and Worldwide
ToggleMobile: for internet+call+sms only in EU intern
(VoIP/Sip) FriendCaller or SipCall.ch: Worldwide sms+call