Default [Q] Dual Sim Data plans fine tuning query

Hi

Have had a search and think know the answer but (seems to be a general rule that only one sim slot works for data) but have seen mention in posts of newer phones which have 3g on both sim slots ....

I would like to use 2 sims for :-

A) Work Sim

Work Calls
Email (get lots of email and dont want to use my personal data plan)
Navigation
Tethering
Work Apps (construction projects data base)

B) Personal Sim

Personal Calls
Personal Email
Personal Surfing
Personal Navigation
Personal tethering

Im guessing this level of control is not yet avaliable ?