Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
Same here on 5S. got some error #27 and went to recovery mode.. Now restoring..

EDIT: Not able to verify.. Error #5 now.. WTH
 
Yeah the OTA update kicked my iPhone 5 into recovery mode. Guess it was my turn to be in the unlucky 0.1% who had issues updating this time around. Oh well, time to restore...
 
iOS 7 destroyed my 4 too. Lost most of my apps and corrupted my backup so I couldn't restore to it. Every update hurts my phone more and more...
 
I updated my iPhone 4S with iTunes with no errors. The phone has been working fine since then.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.