iTunes could not back up iPhone because the backup session failed.

Have you tried it again?

Hello,

I have the exact same problem but with a new iphone out of the box. Syncing and putting things on the iphone works like a charm. But as soon as it starts to backup I get this error message.

I tried restarting the phone, restarting the computer, different usb ports, with nothing else connected to macbook pro early 2008 running snow leopard and iTunes 9.0.1.

All over the web I read about this problem but just with iPhones that were jail broken.

Anybody a hint?

Thank in advance!

i had this problem until apple fixes the software you will have this problem when you hook your phone up to your computer the computer is not recognising the phone thats why it wont back up does your phone freeze after it trys to backup?

The computer is recognizing the iPhone just fine. I'm able to put content on the phone as well.

But as soon as I try to backup I get following error message:
iTunes could not back up iPhone because the session failed...

Whenever I have syncing issues, I hard reset the phone while it's still connected to the computer. That always seems to clear things up.

he can try that but its still itunes or the os update try reinstalling itunes if that dont work restore the phone.

Nothing really worked and I had to reset everything. So the data of three weeks use is gone.

Anyway now everything is back to normal.

Thanks for you help!

i know samething happened to me apple needs to fix this problem asap.