How to Calibrate an iPhone Screen

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You can't calibrate the sensitivity of the iPhone touch screen but you can calibrate the motion sensors and the screen brightness.

Calibrating the Motion Sensors

Your iPhone's motion sensors can be affected by close proximity to a magnet or by environmental factors. When this happens, the iPhone notifies you to use the iPhone's Compass app to recalibrate all the motion sensors, including the gyro, magnetometer and accelerometer.

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Step 1

Image Credit: Image courtesy of Apple

Tap the Compass app on the iPhone screen.

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Step 2

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Follow the on-screen prompt to tilt the iPhone screen and roll the red ball around the circle.

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Step 3

Image Credit: Image courtesy of Apple

Continue to tilt the iPhone until a compass appears on the screen. When it does, the motion sensors are calibrated.

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Adjusting the Brightness

Adjust the brightness of your iPhone's display in the Setting app.

Step 1

Image Credit: Image courtesy of Apple

Tap the Settings icon on the iPhone.

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Step 2

Image Credit: Image courtesy of Apple

Tap Display & Brightness.

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Step 3

Image Credit: Image courtesy of Apple

Move the slider at the top of the Display & Brightness screen from left to right until you reach your preferred level of brightness.

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If you turn on Auto-Brightness in the Display & Brightness screen, then the brightness level you choose is the setting your iPhone uses to determine how to adjust the screen brightness for you as you move from one lit environment to a differently lit environment. If you turn off Auto-Brightness, the brightness level you choose remains constant regardless of the environment.

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Adjusting the Sensitivity

Apple doesn't provide a way to adjust the sensitivity of the iPhone's touch screen. If you find the iPhone's screen sluggish or unresponsive, try the following methods to address the problem:

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  • Clean the screen. Just like any glass surface, it collects grease easily, which can interfere with the screen's sensitivity.
  • Restart and -- if necessary -- reset the iPhone.
  • Take your iPhone to an Apple Store for help.

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