You can’t call on your iPhone 5C but no sound comes out of the speaker. We know how annoying this repair issue can be. Or maybe there is sound, but it is muffled, crackling or distorted and the volume bars fail to react when you try to adjust them. The microphone on your iPhone 5c no longer works. It happens, whether it is from a drop, slight water damage or wear and tear, Gadget Fix will get your iPhone 5c microphone working again.