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.

Limitations sending SMS messages to Indian mobile devices

When sending messages to India, your Twilio phone number will not appear as the sender of the message. This is common when sending SMS across international borders. In the case of India, the sender ID will be changed by the carrier before your SMS messages are delivered to end users. Instead of your Twilio number, end users will see a random short number between 5 and 9 digits long, e.g. 5NNNN - 5NNNNNNN.

Messages from Twilio will not be affected by India's national "Do Not Disturb" (DND) list for SMS.

Due to the sender ID change, recipients are unable to send a reply back to your Twilio phone number; SMS messaging to India is 1-way (outbound) only.

If you are interested in conducting two-way messaging with mobile users in India, you may be interested in the Twilio API for WhatsApp.

For more information about two-way SMS support on Twilio, see Receiving Two-Way SMS and MMS Messages with Twilio.

For details about SMS messaging to India, see Twilio’s SMS Guidelines page for India.

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