Unrestricted smart phones should not be available to 9 year olds. Parents who provide such devices are being irresponsible. A friend's 10 year old kid played videogames on his phone, which had more and more porn as he went up levels. Eventually he molested a younger friend, who is now seriously messed up. The parents who gave the kid the phone and paid for the game were proud of how smart he was, but they did not consider that he was still as immature as any other 10 year old.