My Mom is 98 and in addition to Parkinson's tremors in her hands one hand is numb. She is also extremely hard of hearing. Has anyone found a cell phone that is easy to use? She needs a very simple menu, mostly just to make phone calls. She rarely uses other apps. A lot of cell phone screens don't work for her as the tremors can inadvertently cause havoc with the screen switching to things she doesn't want. She would also need one with an amplifier.