If you do not unlock your iPhone for a week, data transfer through the Lightning port is disabled.
With the release of iOS 11.4, Apple will introduce a new security feature that will surely upset law enforcement
It's called USB Restricted Mode and does a simple job. If an iOS device such as an iPhone or iPad is not unlocked for one week, data transfers through the Lightning port will be disabled. To re-enable it, simply unlock the phone using a passcode or biometrics.
The security company Elcomsoft has determined that the limited USB mode consists of the Apple documentation and the iOS developer beta. Tests showed that data transfers are blocked after seven days without having to unlock a device. However, it is still possible to load the device. Even if you connect your device to a computer, the device will not be recognized when the restriction is active.
Elcomsoft believes that the introduction of the USB limited mode is "strictly law enforcement." This means they only have seven days to unlock an iOS device to extract the information it contains. A number of companies offer law enforcement hardware unlocking services. Even if their techniques still work with iOS 11.4, successfully unlocking a device will now be a race against time.
For iPhone and iPad owners, this means your device will be even more secure. For law enforcement agencies, there is additional frustration when trying to gain access to data that may be essential to an investigation.