Please advise, what troubleshooting action should we take here ?

Hi there! When you're experiencing fast busy signals with imported Twilio numbers, here are the troubleshooting steps you should take: 1. Check Twilio Webhook Configuration - Ensure your webhook URL for incoming calls in the Twilio console is correctly pointing to VAPI's server, not to a specific number 2. Review Call Logs - Examine both Twilio and VAPI logs for specific error messages or patterns related to the busy signals (look for "customer-busy" end reasons in the logs) 3. Verify Outbound Call Permissions - Check that: - The phone number has proper permissions to make calls - Your Twilio account hasn't reached usage limits - There are no billing issues affecting call capabilities 4. Check Network Connectivity - Perform a connectivity check between Twilio and your VAPI instance 5. Examine API Request Formatting - Make sure API requests to Twilio include all necessary parameters and are correctly formatted 6. Verify Call Transfer Settings - If forwarding calls, ensure transfer settings are properly configured with the correct number format (E.164) 7. Test with Different Numbers - Try making outbound calls with different numbers to determine if the issue is specific to certain numbers 8. Review Voicemail Handling - Assess how voicemail is handled in your flow, as this might lead to false busy signals If you've tried these steps and still experience issues, please provide more details about your specific setup so I can help further! 😊 Sources: - [Discord Thread 1336407844090906756](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1336407844090906756) - [Discord Thread 1334001638876250233](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1334001638876250233) - [Discord Thread 1336432457943351358](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1336432457943351358)

I checked and verified all above method, but still getting fast busy

Glad you were able to locate the problem Syed!