I have trouble with phones... Tesco phone people are really good at transferring stuff from one phone to its replacement... However, not phone related, but modern tech, just the same...
I have a car with "keyless" opening. (you need to be in possession of a key, but don't have to handle it, just press a button on the door...)
With my wife last week, I, with an armful of shopping, asked my wife to "get" the tailgate... I watched, perplexed, as she delved into the bottom of her handbag, got out the key, pointed the key at the car, and pressed the "unlock" button... So, I still hadn't had the tailgate raised for me... I was still standing, with my arms being stretched, unwilling to place my groceries (OK, two crates of special offer beer...) on the floor so I could raise the tailgate myself...
I said, "you'll have to open the tailgate for me" and she looked perplexed. "press the rubber 'nipple' and raise the tailgate" "That never works for me" she said... But she did it, anyway. (but wasn't happy with me) This week, same deal, but she just opened the tailgate like anyone else, no fuss, no recourse to the key...
This dementia thing is not at all consistent. Sometimes stuff works...
Re the key, and pointing it at the car... In 1989, I gave her my car key to go to the car and sit in comfort while I performed an errand... I got to the car, she was standing outside it? I asked why, and she said the key didn't work... "Show me" So, she pointed the key at the car, pressed the button, and the car didn't open... Because the car didn't have remote opening, the button worked a little torch so you could see where the keyhole was... To insert the key...
Now, she was reasonably educated, was PA at a small firm of property developers, but she did have her moments. pre dementia... (as have I, and most others)