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Troubleshoot: iPhone XS True Tone function not working

As we know,  from the iPhone 8,  the iPhone has True Tone function, and if you replace the iPhone screen without  reading/writing the original iPhone screen data, then the iPhone True Tone function will not working. Here is case, the iPhone XS True Tone is not working after replacing the scree. How to troubleshoot it?




When the iPhone XS uses original screen, the True Tone function is normal. Turn off the iPhone XS, use screwdrivers to remove the iPhone screws at the bottom of the iPhone screen, put iPhone XS on the CPB screen separator. After heating for a while, use LCD screen to open the screen, and then use pry tool to remove the iPhone display assembly.

Install a new iPhone XS screen, press the power button to turn it on, go to Settings to check True Tone function, it's unavailable. Remove the iPhone XS screen again.

Use JC V1 programmer to read the data of the iPhone XS original screen. Once done, take off the iPhone XS original screen.

Now connect the iPhone XS new screen to JC V1 programmer, and then use JC V1 programmer to write the original screen data we just read to the new screen. Once done, take off the iPhone XS new screen.

Assemble the new screen to the iPhone XS, and then turn it on, test the iPhone XS True Tone function, it's working properly now.

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