port-out protection with mobile phone carrier (so someone has more difficulty impersonating you to get your phone and use that to take over other accounts)

• Be careful about places that use a cell phone #, say, texting to it, as verification of who you are.
• how to fight mobile number port out scams
• Utah county woman nearly becomes victim ...
• ~: bbb warns about port-out scams (not actual title)
• "SIM Hijacking as a second factor": https://soylentnews.org/article.pl?sid=18/07/18/1728239