Why True Tone Disappeared After Replaced the iPhone Screen and How to Repair ?

What is True Tone Function ?

True Tone is light-sensing function that adapts the screen's brightness and colors to its surrounding lighting.

Why True Tone Function Disappeared ?

Each part of the iPhone has an internal identification code and an external identification code, which are used for the iOS system and the factory to identify whether the parts have been replaced.

Activating the True tone function requires the identification code of the original screen to be recognized by the system, so the new screen replacement doesn't has the true tone function.

How to Restore the True Tone Function ?

That's easy ! We only need a programmer to write the original code from the old screen to the new screen. It will not take a long time. We take iPhone XS as an example and show you how to restore True Tone of aftermarket screens step by step.

Step 1 iPhone XS Aftermarket Screen True Tone Restoration With Original Screen

Go to Settings>General>About and check the software version of the phone – iOS 13.2. Tap Display & Brightness. We can see that the True Tone has been turned on with the switch being green.

Replace with a new aftermarket screen.

Tap Display & Brightness. We can see that the true tone option has vanished. 2 comments

Step 2

Now, let's restore the true tone with the multi-functional programmer.

First, connect the display extended module with the programmer. Next, connect the original screen with the display extended module.

Then we need to use the programmer to read data on the original screen.

Once finished, disconnect the original screen and connect the aftermarket screen with the display extended module.

This time we use the programmer to write the data to the aftermarket screen. Once finished, disconnect the aftermarket screen. Add a comment

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Step 3

Now we can assemble the phone and test.

Tap Display & Brightness. We can see this time that the True Tone has been turned on with the switch being green. The True Tone has been restored back. Add a comment

Step 4 iPhone XS Aftermarket Screen True Tone Restoration Without Original Screen

Go to Settings>General>About and check the software version of the phone – iOS 13.2. Continue to tap Display & Brightness. We can see that there is no true tone option.

Connect the phone to the computer and open the WL assistance software. The cover board number of the phone has been read automatically.

Continue to power off and disconnect the phone from the computer. Remove the aftermarket screen afterwards. One comment

Step 5

Now, let's restore the true tone without the original screen.

Connect the aftermarket screen with the display extended module and connect the multi-functional true tone programmer to the computer.

To restore true tone without the original screen, we need to write the previously read cover board number to the aftermarket screen with the help of the software.

Step 6

Now we can assemble the phone and test. Get the aftermarket screen installed and connect the battery. Press the power button to turn on the phone.

Continue to tap Display & Brightness. We can see that the True Tone has been turned on with the switch being green. The True Tone has been restored back.

Is It Not a Good Screen Replacement Without the True Tone Function ?

Absolutely Not. Even if you replaced the screen in an Apple store, if you do not write the original identification code to the new screen, there will be also no true tone function. So you can't measure the quality of a screen by this.

But not all the scree's true tone function can be activated, some unscrupulous merchants did not add this function to the screen replacement in order to save costs.

You could buy high-quality screen replacements from Egreatway. Industry leading factory maunufacture for screen replacements, also provide phone parts & accessoires with life-time warranty and better service.