Azure has this issue marked as mitigated. We will monitor things to confirm they remain stable.
Twilio customers may be experiencing SMS delivery failures and delays between a subset of Twilio Phone Numbers and network subscribers on multiple networks in Brazil. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 8 hours or as soon as more information becomes available.
Scheduled maintenance is currently in progress. We will provide updates as necessary.
Monitors
TeamDynamix
SMS Delivery Failures and Delays Between a Subset of Twilio Phone Numbers and Multiple Networks in Brazil
Twilio
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