DD is about to turn 11 and will be getting a phone (it's my old one so will be an iphone). Lots of her friends have already got phones and are on Instagram, Snapchat and Tiktok. I've already told her no to Instagram and Snapchat but I don't really know what Tiktok is or does (I'm quite an old bird).
ALso what rules do you have around the phone? For me, ideally, it's more so I can make sure she's okay as she will need to start taking the bus to school in September for secondary, but I suspect for her it's something quite different. 
TIA