Personally I think you have your own ideas about cell phone use and that is fine, but please if you are going to try to prove some kind of point have the decency to at least read what the posters here have said. Stop inserting your swewed perspective into what we are saying and pay attention to what we actually say.

I never said I wanted my kid to have a phone because someone was "being mean" to her on the bus. And FTR, the kid, who was older and much bigger was KICKING her, not just being mean but physically assaulting her and told her that she better not tell the bus driver. So, she already had a phone and she used it to call me and ask me to meet her because she was afraid to get off with the kid that kicked her. I was thankful she had her phone because she was too scared to tell the bus driver and I was there to make sure the bus driver was told and the kid was dealt with. If you are the kind of parent who would leave their 9 year old to deal with that on their own, well then what I would say about that would probably get me banned.
Now, I also said she got a phone after her incident at summer camp because I wanted to make sure if she needed me she could reach me. She got hurt, and wanted me to pick her up.
If you think those things are being a "helicpoter" parent that is fine, clearly you do not understand the term helicopter parent. It used is to describe a parent that hovers over their child. I don't use the phone to constantly check on my kids, they use it to contact me. A kid calling their parent doesn't fit that description but hey if you don't actually understand the difference between those kind of situations and a hovering helicopter parent, there isn't anything else I can say to help you.
So, my kids got phones when I felt they needed them, so that they didn't have to rely in anyone else to contact me. No, they didn't get one because everyone else has one, my dd was one of the first of her friends to have one. My 13 year old got one when he was 12, long after everyone else. My 9 year old has one because he is involved in many activities and since I can't be with him for every one I let him get a phone. He doesn't even take it to school. He wants an iPhone because everyone else has one. Sure I could afford one and pay the measly $12 a month I pay for my phone, but he isn't getting one because we don't get things just because everyone else does.
Hope all that helps to clear up your skewed perspective