[hu3]

Your mobile phone number might have been cloned [1] to impersonate you in two-factor authentication, password reset or other means of accessing your e-mail or twitter account.

This is a serious concern of mine and I'd love for a security expert to chime in and answer how can I prevent this from happening to me other than being insignificant enough that I'm not a worthy target?

[1] https://en.wikipedia.org/wiki/Phone_cloning

[ballenf]

The common advice is to have a second phone number that isn't public if you have to use SMS as a 2nd factor. Like a Google voice number (assuming that's still around) or other virtual account.