# T-Mobile Services SMS Delivery Issue

- Provider: [Duo Security](https://down.guide/duo)
- Level: confirmed
- Impact: Degraded
- lasted 3h 53m
- started 2025-08-26 06:29 UTC
- SMS Message Delivery, SMS Message Delivery, SMS Message Delivery +64
- us
- id: DWN-d4a9d40c4b
- Official page: https://stspg.io/pfdh9qcjvsdv

## Updates from Duo Security
### 2025-08-26 06:29 UTC: investigating
We are currently investigating an issue affecting SMS delivery to phone numbers using T-Mobile Services in the US.
Please feel free to check back here or subscribe to updates for the latest information regarding any changes or resolutions.

### 2025-08-26 08:02 UTC: identified
We have detected the issue affecting SMS delivery to phone numbers using T-Mobile Services in the US.
Please feel free to check back here or subscribe to updates for the latest information regarding any changes or resolutions.

### 2025-08-26 08:14 UTC: monitoring
We are starting to see recovery post the fix implemented by our service provider for the issue affecting SMS delivery to phone numbers using T-Mobile Services in the US.
Please feel free to check back here or subscribe to updates for the latest information regarding any changes or resolutions.

### 2025-08-26 10:21 UTC: resolved
Duo has confirmed that the issue affecting SMS delivery to phone numbers using T-Mobile services in the US has been fully resolved.

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