Forum Discussion
T-Mobile users are not receiving MFA SMS messages sent via Twilio
A client of mine uses Twilio to send security codes out to their members, and they're reporting an increasing number of T-Mobile users who aren't receiving the texts or phone calls. This has been an ...
Hey Ian, my team has talked to quite a few people sending business text messages that have had issues with dropped or blocked messages on T-Mobile, too. As you may already know, T-Mobile has a daily cap for application-to-person (A2P) text messages. Twilio and many other API providers "lift the ceiling" when sending messages to T-Mobile end users because they don't have a way to properly queue those messages, which can result in messages getting flagged as SPAM and blocked. One way I know this is because Twilio has a 30023 Error Code on their site for A2P 10DLC messages hitting their daily T-Mobile cap. If Twilio queued messages, they wouldn't need a preemptive error code…
I hope this helps! I work at Telgorithm, please let us know if we can assist you further!
