Possible Failed 10DLC Deliveries
Incident
Report for Bandwidth
Postmortem
Between July 16 18:36 - July 17 04:00 UTC, outbound 10DLC SMS messages to T-Mobile subscribers were intermittently unable to be delivered.
Bandwidth is continuing to investigate this issue to identify the root cause and all actions necessary to prevent this from recurring and will update this post with an Incident Report after investigations have concluded.
We are grateful you have entrusted Bandwidth as your communication partner and we are sorry if this issue resulted in any disruption to your services.
Resolved
We've confirmed stability with traffic at this time and we're considering this incident resolved.
Monitoring
We've observed error DLRs return to expected levels at this time and we're currently monitoring for stability.
Update
Bandwidth teams continue to work to resolve this incident.
Update
Bandwidth teams continue to work to resolve this incident.
Update
Bandwidth teams continue to work to resolve this incident.
Update
Bandwidth teams continue to work to resolve this incident.
Update
We are continuing to work on a fix for this issue.
Identified
We’ve identified the issue and we’re currently working on a fix.
Update
We’re still working with our partner to determine the issue and we’ll advise as further updates become available.
Investigating
We’re currently investigating a problem causing increased failed message deliveries to TMobile returning a 4720 error code. We’ve engaged our downstream partner and we’re escalating the incident.
This incident affected: United States Messaging Services (SMS Messaging (SMPP), MMS Messaging (MM4), REST APIs - HTTP SMS Messaging, REST APIs - HTTP MMS Messaging).