![]() I couldn’t turn on 2FA with a site called TaxCaddy that our accountant uses for transferring and tracking tax-related documents. Although QuickBooks Online now offers app-based 2FA, turning it on requires being able to receive a text message first. That failed in the same way-the text message never arrived-but I was able to work around the problem by falling back to email. Since I have no near-term plans to retire and all other SMS text messages were arriving properly, it wasn’t worth my time to figure out why.Ī while later, I needed to log into the Finger Lakes Runners Club QuickBooks Online account, which also had an SMS-mediated login verification. Despite several tries over a few days, the code never arrived on my iPhone. At some point, however, I discovered that I couldn’t log in to my Social Security account because it needed me to enter a code texted to my cell phone number. ![]() In August 2021, we switched from AT&T to T-Mobile, and it has been a highly positive move for the most part. But I’ve just resolved a problem where SMS 2FA codes didn’t work, and it’s worth sharing in case you or someone else you know is experiencing a similar problem. The problem is that, for most people, most of the time, it works. Unfortunately, even though the problems with SMS for 2FA are well-known, many companies and government organizations continue to use it. SMS text messages are a weak, dangerous way of providing two-factor authentication codes, as we discussed years ago in “ Facebook Shows Why SMS Isn’t Ideal for Two-Factor Authentication” (19 February 2018). Not Receiving SMS Text Message 2FA Codes? Call Your Carrier #1669: OS security updates, ambiguity of emoji, small business payments with Melio, Twitter now X.#1670: Arc Web browser hits 1.0 release, “Do You Use It?” polls about Apple features. ![]()
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