Good evening, Jazzgirl!
Thank you very much for your helpful information!
In the past, I have "pocket-dialled" folk by accident.
My phone being in my jacket or shirt pocket at the time and I must have inadvertently banged or knocked it somehow.
But today, my phone was sitting on my desk as usual.
I was repairing my Chambers with glue, and then went to kitchen for a few minutes to make my tea, came back when my phone rang and it was my daughter-in-law calling, thinking something was wrong.
She said I had called her but did not speak!
So, I am at a loss to understand how it happened.
The call lasted 8 minutes.
I almost never use my mobile phone for calls, but prefer texting and WhatsApping.
Anyway I set the anti-virus app loose on the phone, and Malwarebytes, and it seems to be fine now!