What age is a good age for kids to have a cell phone? I personally think my kids can have one as soon as he can remember…

What age is a good age for kids to have a cell phone? I personally think my kids can have one as soon as he can remember phone numbers. But I'm talking about an iPhone. One that works on wifi so he can FaceTime mommy while he's at Grandmas. For me to actually pay for a line for him ....hmmm that s good question. There are kid watches for communication in case of an emergency. It'll be a long journey raising these new millennial babies. What are your thoughts Mommas?