Hey again! https://github.com/sms77io/php-client/blob/ec0339d72bcdfa930b80ab1c8cd2e2838b944d46/src/Response/Sms.php#L19 `(bool)"false"` does not evaluate to the boolean value `FALSE` but to the boolean value `TRUE`. https://www.php.net/manual/en/language.types.boolean.php ;) Cheers!