iPhone X/XS/XS Max Face ID is Not Available - Reasons & Solutions

Some users have reported that their iPhone XS Face ID is not available. For this case, Apple has released some solutions on the official website. However, these solutions can only fix software defects, and in many cases, these cannot solve the problem. If the iPhone XS fails to use the Face ID after repair, this video tells you why.
Publisher: Witrigs - http://www.witrigs.com/

There are 3 reasons: defective light sensor, dirty dot projector and encryption chip. And these solutions are suitable for iPhone X, iPhone XR, iPhone XS and iPhone XS Max.
When repairing the iPhone, be careful to disconnect the battery first, avoid damaging any kind of sensor and cable, and keep the internal parts clean so that the face recognition function is not invalid.

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