Boudicca
Seaside Queen
She has a mobile phone and an Amazon account. She didn't use the phone much until a short stay in hospital gave her a crash course in how to use it.Just be aware, if you add the Echo device using your account, they can in theory call any of your contacts. Otherwise, you would need to set up an Amazon account for them, sign in with those details on the Alexa app, on a separate smart phone.
It was easier to add the Echo I put in my dad's house to my own account. He had dementia / brain injury and was very unlikely to call any of my contacts. Needed to drop in on him, especially during 2020 as he would usually not answer the landline and I was about 190 miles away.
She's very cautious doing online stuff, but she does a bit of banking and an occasional Amazon & Morrison's order.