Hi
I have three girls.
My eldest was allowed a phone when she started to play out with her friends alone.. she was 11. I wanted her to get used to the responsibility, as would need one when she went to high school that same year. ( high school is a bus and train journey away..). It was only a cheap one!!
My middle one who is now 11 has her elder sister, who is now 13, old cheap one.
Its your choice, but I certainly would not be persuaded in to buying an all singing and dancing mobile. I have told mine, that when they earn their own monet they can buy any phone they choose!!!
J x