RE: If you have a child, at what age do you think it's best to give them a smartphone?/ Look at Science observations !!!

One way to solve children access to unnecessary information with the use of a smartphone, is using parental control. Never buy a smartphone without parental control, if my little cousins come to visit, they tend to use my Samsung tab to access the internet and do things, but because they are not up to 18 years, I immediately switch to parental control on the phone and leave them to it. I also activate parental control on my WIFI connection to reduce the limit of data being used.

Those do the trick