I got the update notice not so long ago:

According to some people who got this update a while ago (ie. it's already happened) report that it does not fix the same issue which plagues iPhone users. Yes I know the iPhone isn't a supported device but surely the fix for Blackberry would also fix the iPhone problem
(nb. the problem with iPhone is that the MBDN field is blank on the SIM card so you can't set a custom number to ring Voicemail like you can for 2degrees/other properly setup SIMs -- I suspect this is the same for the Blackberry).
Can anyone 'in the know' comment on if this update was supposed to fix the MBDN field problem, or will that be fixed by these "V3" sim cards. Is it known when they will be coming out? I know that Micro SIMs are due in early August - will they have the MBDN field properly setup?
Cheers