DD is 10 and has an old phone of MIL's to use for games etc. She also has a tablet.
She's a young ten in many ways and is in no way ready for social media. Most of her school friends are the same.
But she has two friends who are very good mates of hers who don't go to her school and who both have iphones. These kids do a lot of live chat on their phones and DD is DESPERATE fore one. 
I feel irritated that their parents have allowed this and anyway I can't afford to buy DD an iphone.
Am I wrong to keep saying no? Her sister got an iphone at 12 and it was second hand....a hand me down.