I am French, so I hope my explanations will be clear enough.
I received my Faiphone a week ago and since then once per day when I want to listen to a podcast, watch a YouTube video or when an alarm goes on, there is no sound.
Most of the time, it happens when I unplug my headphones. The sound should be coming from the speakers but there is nothing.
I don’t think it could be a hardware issue because when I test the ringtones, there is no problem. Also when I turn off/on the phone, the problem is fixed (temporarily).
By the way, my phone also reboots by itself often without reason.
I also have the new fairphone 3 and have the same problem since two days.
When i regulate the volume the sound is working again. But only when it hits the right loudness treshold.
With the fact that it is also resolved with a reboot I think this is some kind of a softare bug.
I have the latest Firmware installed.
This may be related to a now recognised software issue. Re having to adjust speaker volume triggered by many things including maybe unplugging a headset bluetooth or otherwise.
Please see the following posts
a) A response from Fairphone. If you read the whole topic it may resonate with your issue…
b) You may like to carry out this test and respond to that topic.