I found out how to activate this card from outside France. By following the
instructions on SFR's web site, I activated the card online. I was allocated a memorable +33 6 01 number which I will port to B&You. I could also get the
RIO porting code by dialling 3179 while roaming at no charge. The card also has €10, not €5, of free credit, although most of this will be wasted once I port the number.