Another BlackJack Mystery: SMS messages in Europe

I’m often puzzled by aspects of my Windows Mobile device (a Cingular Blackjack / Samsung i607).

One is its occasional glimpses into the future (see here and here). Another is its refusal to expose my location to Google Maps.

One I haven’t ever figured out is the fact that whenever I travel in Europe (usually Switzerland and Germany) I get tons of SMS messages. They seem to be “Cell Broadcast” messages, meaning they aren’t sent directly to me but to everyone - but my phone seems to pick those CB messages out of the stream only while in Europe.
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