My sons iphone 7 is displaying Iphone Unavailable and cant accept the passcode, what should we do?
How to reset passcode when iphone is locked
Earlier iPhone models
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If the message displayed is iPhone unavailable, please follow the steps in this article If you see an iPhone or iPad unavailable message or Security Lockout screen - Apple Support
If you forgot the passcode and the device is disabled then you'll have to erase your iPhone, if you don't have a backup, you won't be able to restore your data and settings.
Here's how to restore the iPhone If you forgot your iPhone passcode - Apple Support