MFA SMS Code issues for T-Mobile

As of 2:45 PM CT on 10/21 we've confirmed full resolution of the issue that was causing users with T-Mobile devices not to receive MFA login codes via SMS beginning at roughly 1:20 PM CT.

Thank you for your patience as we worked with T-Mobile to resolve this issue.

At approximately 2 PM CT on 10/21 we began receiving reports from users that they were able to successfully receive SMS codes to their T-Mobile devices, which had been blocked due to a T-Mobile network issue that began at 1:20 PM CT. We are closely monitoring the situation to ensure the issue is fully resolved.

Thank you for your patience during this time. If you do experience any issues receiving SMS codes, please contact our support team at 800-655-8138.

We are investigating the cause of the incident blocking users from receiving MFA login codes via SMS codes, which appears to be limited to those using T-Mobile devices. The issue was identified at 1:20 PM CT on 10/21. Users can call the Built Support team at 800-655-8138 for help transitioning MFA from SMS codes to an authenticator app in order to log in.

We will provide updates as we have them, and we appreciate your patience while we work to resolve the issue.