http://www.teltarif.de/arch/2006/kw28/s22343.html
FINALLY! 3 full pages on info on international SIM cards.
"too nice to be true"....
exotic #s
hard to reach
overveiw of available cards
conclusion:
not recommended for India or USA
balance validity and expiration could be an issue
"Trotzdem kann sich der Einsatz einer solchen Karte in vielen F?llen lohnen - vor allem, wenn man h?ufig in L?nder f?hrt, in denen man die Roaming-Kosten f?r ankommende Gespr?che sparen kann. Denn selbst mit speziellen Auslandsangeboten wie dem Reiseversprechen von Vodafone zahlt man f?r ein ankommendes Gespr?ch mindestens 75 Cent pro Anruf....."
Despite these shortcomings the use of such a card can be advantageous in many cases. This is especially true if one travels frequently to countries where you could save on roaming costs for inbound calls. Even with such special offers as the Vodafone travel promise one has to pay at least 75 cents for an inbound call.