All she has to do is press the appropriate speed dialled number on the phone...
Something as easily handled as this... Originally designed for use by very young children...
Are you in contact with the Hospice service???... They must have encountered this before, and should have ideas to share...
Again, I'll be thinking of, and praying for your mum and the family...
Perhaps if you get a chance, you might keep us informed of how things go...
God bless...
Darth..