Headset not Supported

[AndreasKemper]

When I plug a normal 3,5mm Audio Cable or my Sony Headset in, my Phone says "Headset wird nicht unterstützt" which means Headset not Supported. I already restarted my phone, but it don't get away. I don't want to reset my phone, 'cause it's a huge effort... 

Edit: Now I have done the Software Repair and my Problem is still there... 

[AndreasKemper]

But they (Sony) repaired my phone already and it still don't work. Since one of the last Updates a normal Aux Cable work, but no Headsets or Headphones. They are still "not supported" 

[DanBon83]

Very frustrating dealing with Sony on this issue. 

[Hiwatari]

Same here, headset not supported, i have went trough all steps in smart connect and even reset whole memory on device but stil "not supported" is it some problem with last system pach or it just randomly happens ??