- Catch all SIP error codes (not just 403) in registration failures
- Query Twilio API on error to get detailed account status
- Show helpful message like "Twilio account suspended - add funds"
- Retry registration after 2 minutes instead of exiting
- Add restart() method to Baresip for clean reconnection
Requires TWILIO_ACCOUNT_SID and TWILIO_AUTH_TOKEN env vars for
detailed error messages.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>