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2015-10-22 07:59 PM
2015-10-22 08:03 PM
things to try
settings > apps > all > smartconnect > clear data > restart the phone > check again
try a different pair of headphones
"I'd rather be hated for who I am, than loved for who I am not." Kurt Cobain (1967-1994)
2015-10-23 04:52 AM
Welcome to the community,
If by chance this is hardware related you would need to speak with customer care to have the device checked out, use my signature to find contact details.
2016-02-16 10:28 AM
2016-05-14 02:40 AM
2016-06-11 09:37 AM - edited 2016-06-11 02:44 PM
Great! My headphone splitter not working too. Working with all other modern phones, but not with m4!
First my forntcamera stopped working forever, and now this. Sony just make me "happy".
UPD: Well, at least mh750 working, millimeter differences in jack...
2016-06-21 04:30 PM
I'm having this problem too. There is nothing wrong with the actual headphones, it looks like it is quite a common glitch in the phone. Is there a way to fix it?
2016-06-28 08:36 PM
2016-07-19 07:56 AM
Same issue here on my M4 Aqua. Have tried multiple headphones, cleaned socket with a narrow cotton tip with alcohol. Cleared data in Smart Connect App, held power and volume up for a reset. Originally, the right channel stopped working, then left, and now volume adjuster pops up and goes haywire when plugging in headphones. Socket looks clean.