Here I’m recommending an app for android users to test if the proximity sensor in your device is present and in working condition.
Download the app from here: https://play.google.com/store/apps/details?id=io.kodular.borekbandell.Proximity_sensor_test&hl=en_IN&gl=US
Once installed, follow these steps for the test.
Step 1: Click on Basic Test
Step 2: Click on Test
Step 3: The screen should ideally be RED when you’ve not placed your hand near device’s earpiece like the screenshot here
Step 4: The screen should ideally turn GREEN when you’ve placed your hand near device’s earpiece like the screenshot here
Result: The screen should ideally turn GREEN when you’ve placed your hand at a distance of upto 5 centimeters from the earpiece, only then it is said that a physical proximity sensor in your device is present and in working condition!
To use Niyo Wave functionality properly, your device should pass the above test. Also, make sure to wave very close to the earpiece (distance should be maintained upto 5 centimetres) of your device to get the best results of this feature!
P.S: iPhone users need not worry as there’s a proximity sensor present in each iPhone device irrespective of the make and model of the device.
If you have any concerns regarding this, feel free to reach out!