[/quote] Of course no random person can get control of your phone. Most phones (that aren't very old) receive regular security updates but it is up to you to make sure that your private data is safe.

[/quote] I don't mean to argue but its actually not very hard to hack someones phone account if you are somewhat educated in how to do it (I am not).

This article from robes will shed some light on the subject.
https://www.forbes.com/sites/laurashin/2016/12/21/hackers-are-hijacking-phone-numbers-and-breaking-into-email-and-bank-accounts-how-to-protect-yourself/#450f9a1d360f