Call speaker volume low

Hi everyone!
My MX3 ear call speaker volume is very low.
I’ve tried to boost the volume, it didn’t solve the problem.
What can I do to hear again in the speaker like normal?

How?

I think the volume controll is only for Media like Music and video. Sounds have there own volume regulator in the options.
So if u set a ringing tone and have it set pretty low, the phone will ring silently even if u set mediavolume to 100%.

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