I have a Nokia 5 running Android 7.1.2. There is a fluctuating static sound that is audible through both the loudspeaker and earphones when running apps/games that produce sound and when listening to different formats of high quality audio. The sound actually also seems to distort the audio at some points. I'm not sure if it's a hardware or software issue since it happens with both the earphones and the speaker, but I was wondering if I should return it under warranty or wait for an update which will fix it. I'm really disappointed.