Hi everyone, we're planning to set up a US number for SMS with Retell. Could someone clarify the verification process (Business/Brand Verification, A2P 10DLC, etc.) and the typical approval timelines for each step? Also, can we start testing before all verifications are completed? Thanks!

The main blocker is usually not Retell itself but the US carrier compliance requirements. You'll typically need business verification, brand registration, and A2P 10DLC campaign approval before you can reliably send production SMS. You can often test during setup with limited capabilities, but carrier-approved messaging is what ensures good deliverability and avoids filtering. Are you planning to use Retell's native SMS capabilities or connecting your own provider like Twilio? @imran_sk85

we are trying retell sms, twillio and as well as vonage

Since you're testing Retell SMS alongside Twilio and Vonage, the key thing I'd focus on is the carrier compliance side rather than the provider. Regardless of which platform you use, you'll still need Business Verification, Brand Registration, and A2P 10DLC for production SMS to US numbers. I've helped set up these workflows and can help you choose the quickest path based on your use case. One question: are you sending transactional messages (OTPs, appointment reminders, AI follow-ups) or marketing SMS? @imran_sk85

appointment reminders

sounds like you're hitting some roadblocks with the carriers. what kind of reminders are you setting up?