Is the mute icon being displayed on the screen? Have try tried pressing the mute key on the phone a few times to check if you can then be heard on a call?
Can you be heard OK when using the phone in hands free mode by pressing the speaker key on the phone?
1 
Hi @charlymavute
Is the mute icon being displayed on the screen? Have try tried pressing the mute key on the phone a few times to check if you can then be heard on a call?
Can you be heard OK when using the phone in hands free mode by pressing the speaker key on the phone?
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