[inquisitor]

Now if activation of local IMSIs really becomes mandatory for toggle countries what happens if I travel to more than 9 countries within a month? Afaik toggle SIM cards cannot hold more than 9 IMSIs which would leave me without service in the tenth country. Not a very likely scenario anyway.

I wonder what happens if you enter a toggle country without a local IMSI. Couldn't toggle just automatically assign a local IMSI over the air once it discovers a customer roaming in a toggle country using his Roaming IMSI?
If they can't automatize it local IMSIs should at least be available for subscription by USSD or the STK menu, so customers do not need to access the Internet before entering a toggle country but can obtain a local IMSI free of charge from their handset.