Proximity Sensor Test is an Android application developed by SourceNet Italia, available for free in the Business & Productivity category. This app serves the purpose of testing the proximity sensor located on the upper front part of the phone, above the display. By moving your hand or finger over the sensor, the frame color should transition between red and green, indicating sensor functionality.

If the proximity sensor does not operate as expected, calibration may be necessary. Users are advised to contact their phone manufacturer for calibration instructions or search online for guidance. Possible reasons for sensor malfunctions include screen protection film interference, sensor cleanliness, or incompatible phone cases. For further assistance, users can reach out to the phone manufacturer's support service.