iPhone 4 32GB compatibility with Volvo USB

I think you will resolve it by doing this:

Turn off the iPhone completely.
Turn off the car completely.
Plug in the iPhone in the car.
Turn the car on (ignition mode)

The iPhone will now boot, give you one or two messages that the unit might not be completely compatible, and then (hopefully) work.

Let me know if it helped!

Message was edited by: Clinched

It really helped 🙂
I had to do it twice (Turn of car and phone) but the second time I got a message on my iphone that this device was not compatible and could reduce the quality of the sound. I pressed OK and everything seems to work fine. I can change play lists with “phone enter” and change tracks with the “radio seek” button, and the sound is greate. Thanks a lot
By the way my car is a brand new V70

What about the Volvo built-in bluetooth handfree system ?
I really want to known if iphone 4 is compatible with it.
I am driving 2008 S80.

I have a 3 month old, new model Volvo C30 with factory bluetooth. Works a treat with my iphone 4.

Thanks for letting me know.
So, I can buy a iphone 4 now.

Thanks for all the feedback on this issue. I have a 2009 S40 & have been considering upgrading my iPhone 3G to the iPhone 4. But when I contacted Volvo they have yet to test the iPhone 4 with their handsfree & USB system, so I was hesitant to upgrade. My iPhone 3G is running iOS4 & works fine with all systems in my car (I had to do the suggested car off/phone off steps to get it to sync after updating), but I was worried that the newer iPhone wouldn't be compatible. I have a long commute & do 90% of my phone chatting while in the car & I wouldn't want a phone that doesn't work with the handsfree!

If it works with iOS4, I hope both iphone4 and iphone3 should be alright. Anyway can update me on that ?

Confirmed with an iPhone 3GS with OS4. This was working in my 2010 Volvo XC60 before OS4. One variation on the reported issue is that it would play for 1 minute before the USB Unreadable error message is displayed. Unplugging and plugging back in would only cause the same issue again. Tried the fix just now and it worked perfectly (turn off iPhone completely, plug in to car, stereo on and in USB mode). The iPhone powered up from off and rebooted. Pressed OK when prompted about the device compatibility. Note you may have to skip the first track for the fix to take effect. Apple (I know you are reading this Steve) please fix in the next release - Very frustrating!

I have a 2010 S80. Bluetooth works well with both my iPhone 4 and original iPhone. I have been unable to get my iPhone 4 to sync with the factory radio via USB (my original iPhone works fine this way). I'm going to try some of the suggestions in this string to resolve that.

Hello all. I had this same problem with iOS 4.2 in my Volvo XC60. This is now fixed with iOS 4.3. The iPOD functionality in my iPhone works perfectly now. 🙂