Your cell phone number could be hijacked unless you add a PIN to your carrier account

Two-factor authentication doesn't help if someone has already stolen your phone number.
    Related:
  • Security
  • iOS
  • iPhone
  • Smartphones
Glenn Fleishman’s most recent books include Take Control of iOS & iPadOS Privacy and Security, Second Edition (covering iOS 15/iPadOS 15), Take Control of Your M-Series Mac, and Take Control of Securing Your Mac. In his spare time, he makes Tiny Type Museums. He’s a senior contributor to Macworld, where he writes Mac 911.