For parents who are opposed to the technology in the hands of children, any senior phone will do, with a broken keyboard, and the speed dial(s) set to the paren

For parents who are opposed to the technology in the hands of children, any senior phone will do, with a broken keyboard, and the speed dial(s) set to the parent phone(s) - this of course, depends on the age of the child. I agree that a persistent communication channel is a helpful tool to develop independence.