Motorola RAZR V3c

Hi: There is an icon on my phone that I don't know what it is and if it affects my phone by making it not work properly. It is a speaker looking icon with a line through it. It is not the satellite icon. Does it have to do with ringing? No one at the place I purchased it knows. I can't find it on any websites. Can someone tell me what it is and how to fix it?

Thanks in advance!!