Has anyone used one before?
There seem to be two types, one where you have to trim your sims to fit an adaptor, and another where you dont.
This video shows one of the dual sims working with a Blackberry Bold
http://www.youtube.com/watch?v=Nrn3G-CuB54
-I don't have a blackberry, but how would BBM work with this, would it only work when the registered sim was active, or is it via the phone etc?