Audio problem

[Ingrid40]

Audio problem
I can not hear my contacts when they call me and a logo in the form of a helmet appeared I do not understand why.

Problème audio

Je n'entends plus mes contacts lorsqu ils m'appellent et un logo en forme de casque est apparu je ne comprends pas pourquoi. 

[Uliwooly]

@Ingrid40 

I've edited your post as this is an English only forum, you can use Google Translate to reply and/or post.

Does the phone has a protective case that might be blocking the mic? 

could you take a screenshot of the logo?