LOW in call volume problem !

[Octav]

I tried all the right side +/- volume button countless time and still I can barely hear the other part talking. Every time I talk to someone in order to hear what is he talking I have to push loudspeakers, but I don't think this is the right solution for this issue. Can anyone help me with this, please? 

Thank you.

[Johan]

Hi and welcome to the community! Since you're new please be sure that you have checked out our Discussion guidelines.

Download this application and run a test on your ear speaker to check if there is any problem with the speak itself.

https://play.google.com/store/apps/details?id=com.sonymobile.androidapp.functiontester

If it sounds OK during the test it most likely a network related problem. So changing SIM card could be a good idea.

If the volume is still far to low during the test I think that this needs to be examined and fixed at a repair center. For more information about how to submit your phone for repair and where, contact your local support team.

[Octav]

Thank you for your quick responce.

I installed that app and it says my earphone is ok. I will try to change my sim card, though on other phones I can hear much more louder with the same sim card.