After failing to receive SMS text messages from five financial services websites that use them for two-factor authentication codes, Adam Engst resolved his problem with a quick call to T-Mobile to ...

My advice has long been to remove phone numbers from your online accounts wherever you can, and avoid selecting SMS or phone calls for second factor or one-time codes.

Do you receive login security codes for your online accounts via text message? These are the six- or seven-digit numbers sent via SMS that you need to enter along with your password when trying to ...

A million two-factor authentication codes sent via SMS passed through an obscure third-party company. Here's how it happened and why it's a problem.

Text messaging or online SMS is considered one of the most effective methods of driving traffic to an e-commerce store.