A2P 10DLC Campaign Vetting Delays: Twilio cannot approve 10DLC Campaigns ourselves, and must rely on third parties who control our connections to carriers to sign off. These external processes are creating several week delays for our customers. We continue to escalate these issues and are working to reduce delays wherever possible. Further details will be shared in the Campaign Vetting Changes article as they become available.
Yes it does! Your firewall should allow outgoing TCP and UDP traffic from your application(s) to Twilio’s infrastructure, and allow return traffic in response. Twilio will never initiate a connection to SDK applications, so the firewall should not allow externally initiated connections back into the network.
For full details, see Voice SDKs Network Connectivity Requirements.