Ahhhh well that you shouldn't let house maids have phones because then they might get a boyfriend blah blah etc.
Then they start relating stories about how someone let a maid have a phone and then this driver took her number etc
It is seen as unwise and imprudent because then only haram things will come of it.

What it is really it keeps them isolated from
a. any social network
b. practical help
So they can be 24/7 at beck and call....

Also any maids who have been 'checked upon' by authorities have been done so with the family present!!! mmmmm