[b112]

How does my VOIP number being in my friend's address book, enable Google to see that address book, and learn my mobile number?

My goal is not to ensure no one is capable of tracking me ; that's literally impossible. However, I do not want:

* Google to get my name, contact info, etc via my phone itself

* Google to link to me, by seeing my mobile phone in another person's contacts

This is why I give no one my mobile number.

If the Government, or if someone was suing me, or I was up to "no good", an exhaustive search would likely bear fruit. So? That's an entirely different animal.

[giantrobot]

> * Google to link to me, by seeing my mobile phone in another person's contacts

I'm pointing out that it takes only one of your friends or acquaintances to add your real mobile number to their address book alongside your VoIP number to ruin your system. People don't think twice about giving apps access to their address book. They're also regularly scooped up by malware.

Your scheme requires you to have perfect OpSec 100% of the time. Just human nature says you've probably goofed and given out your mobile number once or twice. There are enough huge database leaks that your info has probably been leaked by someone you don't even know.

[b112]

I'm pointing out that it takes only one of your friends or acquaintances to add your real mobile number to their address book alongside

I said I don't give my mobile number out. Do you believe my friends work diligently to find this number out? And how would they get it? And why do you believe they would get it so easily.

I don't even know my number without looking in 'about phone'.

Your scheme requires you to have perfect OpSec 100% of the time. Just human nature says you've probably goofed and given out your mobile number once or twice.

I don't understand why you think I would do that? Or how it would happen by accident.

When someone asks my number, why would I give a number I never do, instead of the number I always do. Why would I even memorize my real number? I really don't understand why you think this is hard, tricky.

Or think it is a "scheme".

I use cash almost everywhere too. I have a friend who thinks this is strange, and sketchy. Cash. Sketchy. I just get bewildered when I encounter these types of thought processes...