out of your house (their place of employment) on their ONE day a week off. They are ADULTS!!
Ditto for the buying their own mobile out of their own money.

The argument about what MIGHT happen just doesn't work, I'm afraid. There's a lot of stuff that MIGHT happen -- she might drink, use drugs, whore around, etc. But that doesn't mean you can restrict her life to such a degree.

I get that it comes back to bite you on the butt as their employer should they do anything illegal, but as Gypsy and others have said, that's a risk you take when you enter into this kind of agreement. So do your homework! It doesn't give you license to treat them like children or pieces of property.

On my compound in the last 6 months three families have had their maids run away from them. I have no doubt it is due to the poor treatment they received from their employers (locking up kitchen cabinets to restrict after hours access to food, not letting them even talk with any other maids/nannies on the compound, certainly not letting them go outside on their non-existent day off...). One of the maids I was actually feeding on the side, secretly, because her employer wouldn't give her enough food to eat.

Pathetic really.

It would be nice if Qatar would take the lead in dealing with this issue that is rampant around the Gulf. If they had people on staff 24/7 to handle calls and referrals about mistreatment of domestic workers, and they actually enacted and enforced penalties, then employers would have to ensure that THEY behaved humanly and fairly towards them.

Kudos to diamond and some others who advocate treating domestic workers as well as you can afford to.
People, you're trusting these people with your households, property and (in many cases) your children. Why would you balk at a extra bag of rice, bar of soap, a mobile phone?
WE (the employers) are ALL paid well enough that we can easily afford to do these things for the people we hire. I find it unconscionable when people do otherwise.

"Most plain girls are virtuous because of the scarcity of opportunity to be otherwise."
-- Maya Angelou