Android phones, apps and tablets

The way I'm reading it is "first activation of that SIM". So if you changed the SIM card again you'd have to activate it with a service provider again, but that the SIM card you activated previously would remain activated for future visits.

I don't think that's what Samsung said, it's the first activation of the phone. Once the phone's been activated with a Sim from the territory it was bought in then any SIM can be used.