I empathize with your situation. My friend's father, also a senior with dementia, faced similar struggles. The complexities of modern phones were overwhelming for him. The solution came from
phone for seniors with dementia , which offers phones specifically designed for seniors with dementia. These phones simplify communication, making it less stressful for the user. I recommend you explore their collection. It was a game-changer for my friend's father, and I believe it could greatly benefit your dad as well.