why does everyone think their opinions on the matter of an 11 yo having a phone are important?
Kassee, you need to work out what you want her to have from the phone - do you want her to have a contract and "budget" the minutes/texts etc? do you want her to be able to spend her pocket money on topping up?
If you do want her to have a contract, you can get a HTC desire on tesco for 7.50 a month. Tesco will cap the contract (so she can't go over) and you get 500mb, 5000 texts and 100 mins. Of course, if she has a capped contract and she's at the end of her minutes, she wont be able to call you even in an emergency. You can use home wifi when you are in range.
The phone itself is pretty cheap as far as smartphones go, so if it does have to be replaced, not so bad, but it's free if you take the contract. Tesco uses the o2 network, so if you get good o2 signal near you, it'll be ok