How do I backup my phone
I need to backup my iPhone 14 for a repair
iPhone 14, iOS 16
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Unless you are able to successfully enter the device passcode - this being necessary to unlock the encrypted filesystem - it is simply too late to create a backup.
If you are able to successfully interact with the iPhone - and enter your Passcode - you can backup the device:
How to back up your iPhone, iPad, and iPod touch - Apple Support
