When proximity/light/whatever sensors are covered (i.e phone sitting on desk with screen facing the desk) while receiving call, i get no ringtone sound from top speaker, bottom one is working fine.
I tried to disable beats audio, unchecking "quiet ring on pickup" and "pocket mode" in sound settings, i disabled some apps which might cause such behavior like Viber etc.
Oh, and i did factory reset few days ago, so this should not be the problem. Maybe it was present before factory reset, but i didn't really noticed because i changed my ringtone and it's really really noticeable with it.
Otherwise, i don't have any problems with speakers besides this one.. when i watch youtube, play games or listen to music everything is working as it should.
I'm 100% stock, unrooted - for now, running latest OTA (3.62.401.1).
What could be the problem? Anyone else with same issue?