SWiersma, Dec 17, 2017 : Hi everybody, After 3,5 years of being my buddy my OPO starts having a problem and maybe you guys/girls can help me. I searched a bit around for a similar thread but I couldn't find it. Sorry if it is already there, a link would then be highly appreciated. This just happened overnight two weeks ago: When I call somebody or when somebody calls me they only hear me very faint in the background and they just can't understand me, also on speaker setting. So I thought of a MIC problem but that was ruled out because voice recording, WhatsApp calling and all other things that require the MIC work perfectly. Does any of you have an idea what the (I think Software) problem might be and help me out here? It would be a shame if I need to say goodbye to the OPO... Thanks in advance!