How do I set up Face ID on my iPhone?
My Face id enable
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There may be something wrong with your TrueDepth camera. Please review the following support articles.
If Face ID isn't working on your iPhone or iPad Pro - Apple Support
If an alert says Face ID has an issue on your iPhone or iPad Pro - Apple Support
If the above doesn’t help, please make a reservation at your nearest Apple Store Genius Bar or Apple Authorized Service Provider for diagnostics.