My youngest is 10. He loves to play out every weekend, but his friends houses are quite spread out so if he had to 'call for' his friends without texting first he may have a very long walk for no reason. His phone allows him to text his friends to coordinate meet-ups. He is also able to call me when he's out, or drop a WhatsApp or text, to let me know he's ok, when he'll be back etc.. There are no phone boxes these days for him to put a 10p in and call home, so his phone is handy to keep me in the loop. I can also call him which is useful if I'm running late to pick him up from somewhere or I need him home earlier than we agreed etc..
I feel very safe with him having a phone. He's quite young but has a lot of freedom to play in the village with his friends. His phone has an emergency function on it which if he was ever in danger (hopefully he never will be) he could press to alert emergency services without having to dial a number etc.. it also has a GPS so if he was in danger or lost he could be located.
My son likes to Google things to find answers to questions, and his smart phone enables him to do that. Multiple times a week (sometimes a day!) he says something like 'mummy what's X or y?' or 'why is the sky blue?' or whatever other questions 10yr olds have frequently than I don't always know the answer to!! I can advise us to look at Google together and he searches for the answers to his questions on Google on his phone, then explains the answer to me!
Son also uses his phone to edit videos. He's got some great apps which allow him to create great animations and other interesting videos. He shares them with friends when out and about and sometimes they create animations together and WhatsApp them to me and other parents to show us!
He loves photography and takes loads of photos of wildlife when he's building camps with his friends. Some are pretty good! His smart phone enables his interest in photography and when he gets home from.his adventures he can edit the photos and create some fab pictures!
He can also photograph stuff and use an app to turn those images into a 3D figure which he can print on his 3D printer. It's incredible.
I think phones are great. We just need to be v v careful in how we educate our children about their safety and how we monitor their use.
When I was 10 I didn't have the tech they have now. I had fun outdoors with my friends just as my children do now. But times have changed from the days of the red phone boxes. There is no need to go back in time. Let's embrace the positive changes and look to guide our children in using tech in a safe way to enhance the activities and interests they enjoy.