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 ...

Phone numbers are too easy to hijack While SMS-based two-factor authentication (2FA) may seem convenient and secure because the code is sent directly to your phone in real-time, it has several ...

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 ...

If you need to send SMS to a large number of people but don’t want to spend money, you can use these websites to send unlimited, anonymous SMS to mobile phones for free.

The best way to mitigate this is to simply not use SMS-based authentication. 2FA apps are associated with your device, not your phone number, so they’re impervious to a SIM-swap attack.

SMS codes, which are the codes you receive via text messages when setting up 2FA using a phone number, are not well-protected. SMS messages are not end-to-end encrypted, meaning they can be ...

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.

Last month, Twitter announced its users would no longer be able to use text message two-factor authentication, or SMS 2FA, where a user gets their one-time code as a text message, for free.

Once they have access to your number, they can intercept your text messages, including 2FA codes, and gain unauthorized access to your accounts.