My bluetooth in Prius works for one phone call. At the end of the call, the car says the call is still in progress but is hung up on the phone. I have an android Razor Maxx.
I have a similar issue (not a big concern, IMO though) with my Mitsubishi Outlander SUV with the built in Bluetooth. It seems like there is a short delay between the time you hang up the call on the cell and the display on the stereo unit. After a few seconds, it corrects itself though. If it takes an unusually long amount of time, that's a different story...You have a 2012 and likely still under warranty, so have the Dealer check it out, if it's a problem for you!
Search Toyota Prius Questions
Toyota Prius Experts
Related Models For Sale
Used Cars For Sale