# Outbound SMS Incident - T-Mobile

- Provider: [Bandwidth](https://down.guide/bandwidth)
- Level: confirmed
- Impact: Degraded
- lasted 1d 5h
- started 2026-09-14 18:31 UTC
- SMS Messaging (SMPP)
- id: DWN-36878faf88
- Official page: https://stspg.io/5pcyllkkxbsh

## Updates from Bandwidth
### 2026-09-14 18:31 UTC: investigating
Bandwidth teams are investigating an off network condition where outbound SMS messages to T-Mobile are receiving an unexpected error code of 4740. These messages may not complete as expected.

### 2026-09-14 23:46 UTC: identified
This incident has been identified as an off network incident. T-Mobile is working to restore expected delivery results. Updates will be provided as they become available.

### 2026-09-15 18:52 UTC: identified
This incident has been identified as an off network incident. T-Mobile is working to restore expected delivery results. Updates will be provided as they become available.

### 2026-09-16 00:09 UTC: resolved
This incident has been resolved.

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