I could be wrong, but I believe the old BIS BB plans are not compatible with the new Z10, so you will likely have to switch. This is the same with all carriers, so it seems BB changed something in their backend systems. I think this was done to ensure it was an easy transition from other OSes to BB, so BB was likely doing this to try to get more customers on their platform easily; IMHO, a good idea.
Thanks for the correction Meowmix, I knew something was a little off, but I haven't used a BB in years, so not sure what's happened on that front for a while. I just knew some of the previous BB plans didn't work with the Z10.
I have a BlackBerry Torch and I want to upgrade to the Z10. I have read you need a new SIM card for the Z10. So does the Z10 come with a new SIM card? or do I have to purchase a new SIM card on top of the Z10 purchase?