Having the phone at the ear, screen switches between on and off

[Razem]

The proximity sensor seems to be kind of wonky at the moment. Same issue:

Proximity sensor goes crazy while calls

Hello to all! I have had an FP4 for just over a month and am very satisfied. Especially the sustainable concept is great. However, I’ve had a problem with the proximity sensor for a few days. First of all, when I use the phone normally (hand-held, not talking on the phone), I don’t have any problems. The problem only occurs when I talk on the phone with the phone to my ear. The problem is that sometimes the screen turns on and the touch function is also activated, even though I hold the phone…

Related issue:

Proximity sensor goes crazy in sunlight (WhatsApp, Signal, Facebook Messenger, Stock Dialer, WaveUp)

Hello, I came across a curious bug today. I use WaveUp to turn the screen on/off using the proximity sensor. Today when I was on a walk, the screen just kept turning on and off like crazy. I noticed that it happens only when the sun shines directly on the phone. If I am correct, the proximity sensor uses IR light to detect objects. So I suspect it’s badly calibrated, but unfortunately (as far as I know) there is no tool to recalibrate it. Note that it works flawlessly inside and outside in the …