iOS 10 is out now. But some users have reported an issue whereby the update 'bricks' (i.e. renders useless) their iPhone or iPad.
However, Apple has fixed the issue. It appears, anyway.
Want iOS 10 now? Here's our guide to downloading it and everything you need to know: iOS 10: how to get it.
The bug sent some devices trying to update into recovery mode, bringing up the 'connect to iTunes' screen while the software tried to install on the iOS device in question.
Which would mean connecting said iOS device to a PC or Mac running iTunes.
Apple claimed the issue didn't affect many people, and that it was now fixed.
"We experienced a brief issue with the software update process, affecting a small number of users during the first hour of availability," a spokesperson said.
"The problem was quickly resolved and we apologise to those customers. Anyone who was affected should connect to iTunes to complete the update or contact AppleCare for help."
To download iOS 10, head to the Settings section of your iOS device and click General>Software Update. iOS 10 should be available. Click it and it'll start downloading over the air.
iOS 10 will run on all devices later than the iPhone 4S, iPad 3 and first-generation iPad Mini.
It brings new animations to the messaging app, as well as handwriting skills and a smarter maps app.