Hi All, I know-it's the hundred millionth iOS 7 install thread. Apologies in advance if this problem has been posted somewhere else, but Googling hasn't turned anything up. This morning I tried to download iOS 7 over-the-air on my iPhone 4S. I got an alert view saying I don't have enough space to download the update. This happened with 6.1.3 a while back, and to remedy the problem I connected to my MBP, let the computer download the update, and installed it. No problems. So this morning I connected to my computer with the USB cable that came with my phone and accepted the prompts to update. Agree to terms and conditions, transfer items, etc etc. Then I had progress bars in iTunes for "Backing up," "Waiting for iPhone," "Verifying update with Apple," "Waiting for iPhone" again. The Apple logo appeared (in iOS 7 style without the shine) with an empty progress bar on my phone. During the second "Waiting for iPhone" progress bar, I got an error on the computer (see attached) saying the following: "The iPhone '[My iPhone]' could not be updated. An unknown error occurred (-1)." My two options were "More Information," which took me here: http://support.apple.com/kb/TS3694 and "OK" which stopped the process on iTunes only. The knowledge base article just said to try restoring two more times (no, I wasn't trying to restore, but that is the link I got from the error message). So everything in iTunes stopped. But the phone stayed on with the iOS 7 Apple logo and the empty progress bar. I waited a few minutes. Touched the screen. Held down the power button. Pressed the home button. Nothing happened. The phone just sat there with the Apple logo and empty progress bar. So I gulped and unplugged the phone. When I pressed the power button and got the dreaded recovery mode screen (it looks like this: http://km.support.apple.com/library...OS/HT1808/HT1808-connect_to_itunes-002-en.png). So I plugged the phone in and iTunes cheerfully informed me that it had detected a device in recovery mode that had to be restored. Not intending to lose all my data, I downloaded RecBoot and pulled my iPhone out of recovery mode without restoring. The shiny, iOS 6 Apple logo appeared, my phone booted normally, and it was as if nothing had ever happened. Per the advice of the knowledge base article, I tried once more. Same result. Then I tried a third time. Same result. I started Googling, but it hasn't ever been jailbroken, I don't use Tiny Umbrella, and I don't have antivirus or firewalls. All the threads seemed to involve iPhones under at least some of these circumstances. I shut down my computer and booted into a partition I've always kept that runs SL 10.6.8 for cases like this. I updated iTunes, waited hours for the update to download again (even if I was using the same corrupt download every time on the normal partition, this was a fresh one, so that's probably not the issue), tried to update, and the exact same thing happened. Downloaded RecBoot onto my SL system, pulled my iPhone out of recovery mode once again, and booted into iOS 6. So now I turn to you. No historical problems with my iPhone (I saw some posts about hardware issues and water damage), no jailbreaking, nothing weird. I don't see why an issue affecting me wouldn't affect the 35% of iPhone users worldwide downloading iOS 7. Please let me know if you have suggestions. I'm still under warranty, but my desire to go into an Apple Store flooded with 5S and 5C seekers isn't that high... Thanks in advance for whatever assistance you can provide.