FCPS, and my kids got our used iPhones in 7th— start of MS. That was common among her friends. And it was helpful to communicate with us— ready to be picked up from ECs, etc.
Younger kid has been incredibly responsible with phone use. Got into a text spat with a friend the first month she had the phone and that’s it. She lost the phone of a couple weeks (as did her friend) and we put them fact to face to work it out. Now a HS freshman, and no limits on when and where the phone can be used. Because responsible use. She doesn’t even want social media yet.
Older DC (ADHD boy) has had non-stop problems. Mostly using the phone for hours on end and not doing class work, etc. and downloading porn. He was returned to a flip phone for the last quarter of 10th grade and last summer. Now he has a smartphone “brick”. All internetbrowsers removed, and not allowed to downloadanything . Can use for phones, text, camera and a few apps, like Spotify and Uber for emergiencies and ParentVUE for grades/ blackboard. FB Messenger because his school group projects and ECs use it, but no FB proper or social media.
He can try again with fewer restrictions next year.