Default [Q] WP 8.1 dual sim function

hi guys

i saw the review of nokia lumia 630 dual sim (passiv dual sim. only one sender/receiver built in)
plus i saw that my nokia lumia 920 just received an sw update regarding "being able to handle dual sim.." (net+).

=> so i wonder if it would be possible to change any lumia into a dual sim phone by using one of those dual sim adapters.
(of course you can use these adapters since ever but you have to switch between the sims manually)

would that work?