Download & Open App "Smart Connect" from Play StoreClick on '+' , to create your own profileClick on '+ Add accessory', to add headset / headphone / Charging / etcClick on 'Headset' radio buttonClick on '->' below right cornerHere we need to add plugin & unplug actions. Click on 'Add Start Action'Click on 'Volume', to set volume levels when headset plugedinSet volume levels as u like & Click 'OK'Click on '+ Add End Action', to add what action to perform after unplug headsetSet Volume levels as u like after unplug headset & Click on 'OK'Click on '->' below right cornerEnter any name to ur settings & Click 'Finish'Now My settings 'Headset plugin' Activated. Check functionality.Go to 'Settings' -> 'Sounds & Notifications'Plugin ur Headset & Check Volume levels changed to ur given settingsNow unplug ur headset, Check volume levels adjust to ur given end actionsSoled ur problem. Don't close App 'Smart Connect' from Multitasking window.Click on 'Subscribe' to get more support. thankyou

I have same problem.
When I play music with headset, ring vol and notification vol automatically sets to approx 25 %. After removing headset, it does not come back to original setting and I am not able to hear ringtone. This is happening after latest update in lenovo a 6000 +.
Any solution ?
Thanks.

I also have the same problem I couldn't hear the voice calls

Solution -Yeah , this is a sort of bug . Even this is present in Lenovo A6010 .There is a alternate solution for this
link https://play.google.com/store/apps/details?id=com.sonyericsson.extras.liveware

When i insert my headset Automatically volume goes down.

When I am using headset automatically call volume going down

I am also having the exact same problem. after upgrade without any proper test they just releases OS very bed.

I am also having the exact same problem. I am only using Bluetooth A2DP speakers. (For music only and not voice calls). It is annoying .... As I cannot hear the ring most of the time.

Hmm.. I'm starting to think this a set up in Lenovo phones. Please contact Lenovo about this problem. Please keep us updated about this.

I have two bluetooth head sets (Nokia BH214 & Bluedio AV890) both are perfectly working with other phones (I have chedked with samsung and redmi 1s), but only problem in Lenovo A6000. when I connected blue tooth head set ringer volume and notification volume will automatically readucing to 25% level. I am increasing volumes manually. I am checking after 5 minutes volumes will be decreasing to 25% level.

Does your Bluetooth headset have volume keys? I'm thinking that it may be the Bluetooth headset causing the problem.

Aafter installing bluetooth volume also decreasing ringer and notification volume to 25% when connected to bluetooth head set.

Try installing Bluetooth Volume (link) from Google Play store and please let us know if that fixes the issue.

it is happening when connected to blue tooth head set only. volume level is decreasing up to 25% only not to zero level.

Hmm... Check if your volume down key is stuck. It may just be it.