That’s a difficult one. My father when he was in a care home, mid 80’s, dementia setting in, living in a small room, used to get comfort from playing with his mobile phone. He always liked computers and tech. He managed to regularly phone one of his granddaughters and when she answered he’d say, “It’s so good of you to phone” and repeat throughout the conversation. His eyesight had all but gone, so I suspect he just liked holding the phone and probably pressing buttons and managed to press the “last number” button.
He’s long dead now, so it was one of the ubiquitous Nokia phones around at the time. My niece told me she got these calls from him regularly and had given up telling him that he had phoned her. It was nice and sad in equal measure.
Sorry I’ve not directly answered your question, but I think these calls aren’t malicious. Just some confused, lonely guy.
