We are pleased to report that the major delivery disruption affecting SMS messages targeted at Unitel subscribers has been fully resolved.

As of today, all outbound SMS traffic to Unitel destinations (+244 92x, 93x, 94x, 97x) is operating at full capacity with normal delivery speeds and success rates.

Resolution & Monitoring Details

Our SRE and network engineering teams conducted extensive end-to-end dispatch tests and verified that upstream connectivity with Unitel's infrastructure has been stabilized.

• Unitel Destinations: Fully operational. Message queues have been cleared.

• Africell & Movicel Destinations: Remained 100% operational throughout the incident window.

Next Steps

We will continue to actively monitor latency and delivery success rates across all carrier links to ensure ongoing stability. No further action is required from client applications.

Thank you for your patience and support during this service restoration period.

The SMS delivery outage affecting the Unitel network has been fully resolved. While we have not received an official statement or Root Cause Analysis (RCA) from the network provider regarding the downtime, our engineering team has conducted extensive automated connectivity and delivery tests. All internal metrics confirm that SMS traffic to Unitel destinations is now flowing normally and successfully reaching end-users.

Impact:

• Unitel: Service has been fully restored. The Ziett platform is successfully dispatching messages, and our systems are receiving normal delivery receipts from the destination network.

• Africell & Movicel: Deliveries remain completely unaffected and continue to operate normally.

Next Steps: This incident is now officially closed. We will resume our standard 24/7 network monitoring. Thank you for your patience and understanding during this service interruption.