Hi Corey.
Thank you for replying.
There are no known issues in Mum's area (I've just checked) and I don't know what she hears when she tries to dial. When I call her, it rings twice or three times and then goes into static. (I can call other people fine.)
My brother also reports the same problem when he tries to call Mum. We really need to sort it out because (as I say) she's a vulnerable older person and I worry she's missing her slot for her jab.
Can I give you her number in a private way to check the line?
David