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      SMS Delivery Issue To Viettel Vietnam Over Pre-Registered Sender ID
      Incident Report for Twilio
      Resolved
      This incident has been resolved.
      Posted Apr 01, 2020 - 00:01 PDT
      Monitoring
      We are seeing signs of recovery in message delivery issues when sending messages over Viettel network in Vietnam over our pre-registered sender ID route. We will continue to monitor to ensure a full recovery.
      Posted Mar 31, 2020 - 23:00 PDT
      Investigating
      We are observing delivery issue to the Viettel network in Vietnam over our pre-registered sender ID route. Our engineers have implemented a work around to save SMS delivery over routes that do not preserve the pre-registered sender ID. As a result, SMS messages might be delivered with either a random longcode or random alphanumeric sender ID. We are also working with our carrier partners to resolve the issue and will provide an update as soon as we have more information.
      Posted Mar 31, 2020 - 21:36 PDT
      This incident affected: CARRIER NETWORK (SMS, APAC).
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