have a Doro of some kind not specified on the phone( box gone,was on mantlepiece for a year before started using it) and have looked thro all makes for the mic in case i have accidentally muted it as people struggle to hear me.....i do have the phone muted the bottom right crossing parallel lines button when all makes show the mic as a slight bulb on top or near the 5 or 8 buttons- theres one above the 5 here tiny little bubble....so just how is a user supposed to know if s/he has accidentally muted the mic as nothing shows up at all if you press it..... should this now be binned? Is it the sound  mute button overriding the system? Experiments have shown this makes little improvement when back on..... i do make calls with it off as forget....i vet all incoming calls see to avoid sales calls and believe if its important a message will be left and sooner or later we will connect when we are both free.....i dont like getting out of the bath to answer a phone selling me cat litter or free this or that....its bullshit 99 times out of 100// advice please....will anyone there with tech knowledge ever see this?????????????