I have just noticed that Vodafone Spain are now also extending Vodafone passort for roaming in USA, Mexico, Brazil, Argentina, Chile, Russia and China... although it is at a higher supplement of €2.49 per call rather than €0.99. Interesting as some of these countries are not "caller-pays" countries. (e.g. USA)
See:
http://www.vodafone.es/particulares/...port/index.jsp
I presume it applies equally to prepaid as well as contract.
Is this available on other countries Vodafone tariffs? There is still no mention of this on the UK Vodafone website.