By Chris Hoffman, HowToGeek.com, June 12, 2017 

Security experts recommend using two-factor authentication to secure your online accounts wherever possible.

Many services default to SMS verification, sending codes via text message to your phone when you try to sign in. But SMS messages have a lot of security problems, and are the least secure option for two-factor authentication.

While we’re going to lay out the case against SMS here, it’s important we first make one thing clear: Using SMS is better than not using two-factor authentication at all.

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