Bandwidth experienced a major incident on September 23, 2026 affecting MMS Messaging (MM4), lasting 3h 56m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- identified Sep 23, 2026, 04:06 PM UTC
Bandwidth teams have identified an incident impacting outbound MMS messaging delays in delivery. Teams are working to restore expected MMS delivery.
- identified Sep 23, 2026, 06:41 PM UTC
Bandwidth teams have confirmed this is an off-network industry condition impacting MMS messaging to AT&T destinations.
- monitoring Sep 23, 2026, 07:18 PM UTC
Teams are observing expected MMS delivery towards AT&T. We will monitor for stability.
- resolved Sep 23, 2026, 08:02 PM UTC
This incident has been resolved.
- postmortem Sep 24, 2026, 11:05 AM UTC
Between 12:30 UTC and 18:45 UTC on September 23rd, 2026, 10DLC MMS messages sent to AT&T destinations experienced delayed delivery. Bandwidth is continuing to investigate this issue to identify 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.