Apple says it has identified and fixed a bug that caused some people to have their phones and tablets rendered unusable after updating to iOS 10.
"We experienced a brief issue with the software update process, affecting a small number of users during the first hour of availability,” an Apple representative told Recode. “The problem was quickly resolved and we apologize to those customers. Anyone who was affected should connect to iTunes to complete the update or contact AppleCare for help."
For those who encountered the issue, attempting to install the iOS 10 update left both iPhones and iPads displaying a message indicating the device needed to be connected to iTunes.
While Apple said the problem is now fixed for users just starting a download, those who began their download some time ago might want to scrap it and start over.
This article originally appeared on Recode.net.