The problem in understanding in general seems to be between 1. those who think of the Nokia tablet as an isolated device, where only its "own" needs matter, and 2. those who use the Nokia tablet as a central interchange point for a bunch of other devices. Nokia as a company tends to think the first way (the exception being the lucid folks behind the N800), presumably because they make phones: You install a card, whatever type, and that's it. No interoperability needed. That's fine for some, but not for others. Thus this discussion comes up time and again.