I see folks saying no access to phones until 16, and others arguing how that will absolutely crush a kid's ability to do stuff socially. Why not just have a 'home' phone? you can use the phone in shared spaces at home, but cannot take it into your room or go to school with it.
unless you send your child to private school where all parents enforce such rule, your kid (that is 12+ year old) is going to be ostracize by majority of peers that have such phone. This is completely different environment comparing to times when we were growing up.
We are a “low screen” homeschooling family. We have a babysitting phone for my daughters to take to babysitting jobs and a landline. At our local pool in the summer, my kids meet neighborhood kids, exchange numbers, but my kids say, “it’s a landline, no texting.” The response: “You just have a landline?!? You can’t text?!?” in a tone of disgust. Every time. Fortunately, we have a community of homeschooling & religious community friends who are raising their kids similarly. But every time a kid’s friend gets a cellphone, texting becomes the medium of socialization, and they drop us. My kids will be the 1% of their generation who can talk on the phone.