the parent said "everyone". there are about 5 billion people over 20. 2 billion is quite conservative. as for your link. iphones are popular, but it's definit

the parent said "everyone". there are about 5 billion people over 20. 2 billion is quite conservative. as for your link. iphones are popular, but it's definitely not true that "everyone" has an iphone, which is my point. android has almost 4 billion active users, for comparison.