I can't stress this enough to new or soon to be parents.
Hold off on giving your child a phone as long as possible. Once your kids are old enough (your choice...but it's before they are teens), send them outside, shut the door, and go about your business.
Tell them to come back for lunch. Then send them outside again and tell them to come back for dinner.
I mean this in all sincerity. Don't plan their day for them. Make them go out and plan their day on the fly. Friend's house a mile away? Walk over and see if they can come out and play. Not home? Oh well, walk back or head to a different friend's house. There is value in this friction.
Don't be the person who gives your child a frictionless youth. The hard way is the best way.