For Emergency Use Only
Truly, cellular phones will never be out of context anymore in the English dictionary. Everybody have one. Even those tiny little people. Parents let their children have a cellular phone even at an early age because they think it will be safer for them. They can call their parents wherever they are, just set a speed dial for them and teach them how to use it. They can also call emergency hotlines if they need one. Truly, it is a very helpful device nowadays but there are also disadvantages it can make.
It can ruin a school day if your child is constantly using them while having a class. It can also be a source a trouble for them even outside. So make sure that we know what are we teaching them and letting them have. Teach them to be a responsible person even at a young age.