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How to Replace a Phone Proximity Sensor
The proximity sensor detects when the phone is held against the ear during a call and automatically blanks the screen to prevent accidental touch inputs. A failed proximity sensor causes the screen to stay on during calls, draining the battery and triggering unwanted keypad presses.
What You Will Need
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Replacement proximity sensor (model-specific)
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Precision screwdrivers
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Plastic pry tools and spudger
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Tweezers
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Heat gun
Step 1 — Test the Sensor
Dial a call and hold the phone to your ear. If the screen stays fully lit, the proximity sensor may be failing. Also test using the phone's built-in diagnostics or a sensor testing app — cover the sensor area at the top of the phone with your finger to simulate a call and watch if the screen dims.
Step 2 — Open the Screen Side
The proximity sensor is positioned at the top of the display assembly, near the earpiece. Heat and open the screen using suction cup and plastic pry tools. Disconnect the battery immediately.
Step 3 — Remove the Sensor
The proximity sensor is usually a small module sitting in a bracket adjacent to the earpiece, connected via a short flex cable. Disconnect the cable and lift the sensor from its housing.
Step 4 — Install the New Sensor
Place the replacement sensor in the bracket with the same orientation as the original. Reconnect the flex cable. Ensure the sensor face is aligned with the sensor window in the top of the phone's front frame.
Step 5 — Test Before Sealing
Reassemble minimally and test by covering the sensor window during a call to confirm the screen blanks. Seal fully only after confirming correct function.
