Cant hear other person on line.

Hi Harvey, if you have normal volume when the phone is on speaker most likely your earpiece has debris in it. Unfortunately, the way phones are designated, the mesh that covers your earpiece holds on to everything that is wiped over it and has no where to go but inside of the phone. Best recommend is a little rubbing alcohol on a q-tip along with a gentle scrub with an old toothbrush. Make sure you turn your phone off and it help to hold the phone with the earpiece down towards a table, gravity will pull some of the debris out while cleaning with the brush. Muted volume is very rarely a faulty earpiece but normally clogged mesh. Hope this helps!