Low volume

I dont know why my phone has a low volume and im compare with my friend phone with same model. My phone has too low volume. Now im at build 087
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I dont know why my phone has a low volume and im compare with my friend phone with same model. My phone has too low volume. Now im at build 087
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@jidanmaretae
Are these two phones tested on the same firmware version?
What is the test method? e.g. call or youtube?
If you try to update to the latest FW version, does the issue still persist?
firmware version: Settings>System>About Phone>Build Number
Thank you.