The world universe of mobile phone is now 8.5 BILLION, which is half. billion moe the there are people. ( I think some markets are counting them as from new, and not ones actually in use, but - who knows?). As there are only 7.9 billion people, that suggests that most folks have now got one, or had one. Most cant operate them to their full extent t of powers, - some cant understand that you need to recharge them, and some cant figure out how to get online. That is changing rapidly with the increased use of Apps.

Im sure some cretin will soon work out how to weaponise them; some sects & religions are already using them to indoctrine and better control their followers.