> For the complete documentation index, see [llms.txt](https://docs-latam.messaging.sinch.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs-latam.messaging.sinch.com/status-page/components-status-page/callback-delivery-report/smpp-callback-delivery-to-carrier.md).

# SMPP Callback (delivery to carrier)

 The instability in this component directly affects the delivery to carrier status in your Webhook