IPhone Users Report Battery Life Dropped Significantly After iOS 11.4 Update

Enter your passcode tap switch to Off position

USB Restricted Mode was added to iOS 11.4.1 and iOS 12 after beta testing in iOS 11.4. After looking at the problem, Apple opted for what seemed like a foolproof solution: USB Restricted Mode.

Once you're done with that, open up Settings, and head to Touch ID & Passcode (or if you're on an iPhone X, you'll need Face ID & Passcode).

The Restricted Mode for the USB data connection that runs over the Lightning plug on iPhones and iPads is part of the iOS 11.4.1 update released by Apple a few hours ago.

What we discovered is that iOS will reset the USB Restrictive Mode countdown timer even if one connects the iPhone to an untrusted USB accessory, one that has never been paired to the iPhone before (well, in fact the accessories do not require pairing at all).

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If you don't first unlock your password-protected iOS device - or you haven't unlocked and connected it to a USB accessory within the past hour - your iOS device won't communicate with the accessory or computer, and in some cases, it might not charge. "Prior to iOS 11.4.1, isolating the iPhone inside a Faraday bag and connecting it to a battery pack would be enough to safely transport it to the lab", Afonin concludes. As a result, the Lightning port can be kept accessible for an hour past the point of initial seizure by plugging in a Lightning accessory. Law enforcement and private companies could leverage the loophole and design new hardware to continue to crack passcodes through the Lightning port. Once complete, you will be notified and will have the ability to set the device up as an entirely new device or restore it from a compatible iTunes or iCloud backup. As the company says though, it is likely an oversight from Apple which will perhaps be fixed in a future point release of iOS 11.4 or when iOS 12 releases later this year. Does installing iOS 11.4.1 fix the issue, or are there better alternatives to solving it?

CoolStar has announced that the Electra jailbreak works on iOS 11.4b3 and has advised all users on a higher firmware version to downgrade while they still can!

Another user pointed out that the iPhone's Settings apps shows that the Personal Hotspot is using up nearly 50 percent of the device's battery life even when the user has never activated it.

Apple hasn't commented yet, but we can assume that a patch will be landing soon.

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