How to fix iPhone 8 auto-brightness not working issue?

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Recently, We got feedback from some customers that iPhone 8 (series and iPhone X) auto-brightness function (ambient light sensor will be disabled) would fail to work even if only replacing LCD and keep using the old sensor flex. Etrade Supply Quality team did a lot of research on this issue, would like to share the result with you guys.
Know more here:https://www.etradesupply.com/blog/fix-iphone-8-8-plus-screen-ambient-light-sensor-disabled/

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How to Replace the iPhone XR Charging Port

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