How to download iOS 11.4.1 to your iPhone and iPad

Ceria Alfonso
Julio 10, 2018

While iOS 11.4.1 has just arrived with a USB Accessories toggle to restrict access to passcode cracking tools, researchers now claim that they have discovered a bug in the latest development.

The feature, which you'll find in iOS 11.4.1, locks down the data connection over the Lightning port one hour after the last time your iOS device is unlocked. On the contrary; the company today released the latest version of the software update, iOS 11.4.1.

Using USB accessories to defeat the data port lock also works in Apple's iOS 12 beta, Afonin said. After all, if you're listening to music with your iPhone hooked up to a USB audio interface, you don't want the music to stop after an hour, and to re-authenticate before you can continue. It also doesn't work if USB Restricted Mode has already been triggered (past the one-hour mark). There is detailed release note only for the iOS update, which mentions the USB Restricted Mode.

It has been seen that the lock doesn't get affected with Apple Lightning to 3.5mm jack adapter, though the one-hour countdown was reset through the official Lightning to USB 3 Camera Adapter.

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However, if you aren't actually happy with the release, and you want to go back to an earlier version of iOS, then be aware that Apple is now only signing iOS 11.4, which means that you will only be able to downgrade to iOS 11.4.

Elcomsoft engineer Oleg Afonin noted that testing showed that once USB Restricted Mode kicks in, there is no obvious way to break it. iPhone users running iOS 11.4 right now have been complaining in droves that battery life has suffered after the update.

iOS 11.4.1 is mostly bug fixes, reports 9to5Mac, but it does make the Find My AirPods feature more reliable. "The ability to postpone USB Restricted Mode by connecting the iPhone to an untrusted USB accessory is probably nothing more than an oversight", Afonin admits.

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