SignalWire SMS Functional Test
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Usage: php Tests/test-signalwire-functional.php <phone_number> <message>

Arguments:
  phone_number  Phone number in E.164 format (e.g., +14155552671)
  message       Message text to send

Example:
  php Tests/test-signalwire-functional.php +14155552671 "Test message from ml2"

ERROR: Missing required arguments