Recently Was Using fine the phone, no issues at all .When I install the Vanced YouTube and activate the VP9 codec in the settings, couple of days later realised that theres no sound coming from the top of my earpiece. Try going settings and call volume too make sure if it's working again but still no sound at the top. When making phone calls , only the bottom speaker is heard and all when I used the speaker button , the earpiece at the top can't be heard . I believed a software issues will be able to fix it since previously it was perfectly fine. Hope it will be rectified soon since it's a very good phone I have used for a while. Also, restarting and factory reset did not fix the issues at all.