With all due respect, the iPhone's "voice dial and Siri" as well as all dialing functions operate outside of the admittedly cumbersome system built into Toyota made vehicles.
This is a different problem and discussion and you should really look through the thread so you better understand what we are discussing. The Bluetooth connection is being made. Something was changed in the coding of IOS8+ that effected the way the connection interacts with the vehicle and is dropping calls initiated on the phone into the vehicle via Bluetooth.
It has worked in all versions prior to IOS 8+ and I have had it work with several other smartphones and cellphones with Bluetooth and voice dialing.
It is is Apple hands to undo what they broke. It concerns me greatly. It is a safety issue and heaven forbid someone is distracted because they can't just say "Call John Smith" and have to manually look up and number and make the call which is illegal in my state, this is more than a troublesome bug.
Shame on you Apple! You should have your engineers get a Toyota vehicle, reproduce the problem and fix it immediately! It's disgraceful how long this is taking to get a fix. For every one person that writes on this board, how many thousands are effected? Shame on you Apple! You have customers loyal enough to stay with Apple after this disgrace.
You know about this board. Have someone give us a status update. Get it fixed!!