Troubleshooting Twilio Issues

Common Issues & Fixes with Twilio

Calls Not Working

• Twilio account not upgraded

• Insufficient balance

• Auto-recharge disabled

SMS Not Delivering (US)

• A2P 10DLC not approved

• Phone number not assigned to campaign

• Opt-in language missing

“Invalid Auth Token”

• Token copied incorrectly

• Token regenerated in Twilio (update in Call Agent AI)

Phone Number Won’t Validate

• Wrong country format

• Number not owned by Twilio account

Sudden Call Failures

• Account balance hit zero

• Auto-recharge disabled

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Best Practices

• Enable auto-recharge

• Keep Twilio credentials private

• Use Web Call Preview for testing

• Complete A2P early if using SMS

• Test after every major change