2006 Prius Bluetooth Behavior with iPhone 4S

I recently upgraded my iPhone from a 3G to a 4S. The latter uses Bluetooth 2, which I think is the source of my problem. I have no trouble connecting, but now incoming calls don't show the caller's name from my Prius phonebook; only the phone number shows (and sometimes not even that). With my iPhone 3G, I didn't have this problem.

I'm assuming that the new behavior is because the iPhone 4S uses Bluetooth 2 and there may be a slight incompatibility with my 2006 Prius Bluetooth.

Does anyone know if this is the problem and whether there's anything I can do about it?

Thanks.

 

Actually, I had a 3G, not 3GS, iPhone. And it did use Bluetooth. But I guess the 2006 Prius is supporting Bluetooth 1 and now the iPhone 4S uses Bluetooth 2. As that's the only real difference with my new phone (as far as my Bluetooth connection is concerned), I assume it's the cause of the problem.

Is there any way to have Toyota upgrade the Prius Bluetooth software? (I doubt it, but figured I'd ask anyway!).

 

I had forgotten that I started this thread almost 2 years ago, so I began another one a few days ago on the same subject:

Bluetooth problem with 2006 Prius and iPhone 4S | PriusChat​

​

Check there for more recent info about my problem. Unfortunately, it doesn't look good.