Some users have reported that they have problems with the sound from the speakers. If you have verified that the problem is not related to a particular application, then the first thing you can do is run a test from the CIT menu to check the status of the speakers .
To do this, just go to Settings >> Device information >> All specifications and click 4 times on “Kernel Version.
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Once the application opens, choose the test that allows you to test the speakers. It is a small test that will only take a few seconds. This way you will be able to detect if it is a hardware problem or a software conflict.
In the first case, you will have to take it to the technical service, and if it is software then try to format the device.