Brazil mobile number verification error

[Mango911]

{
"number": {
"input": "02777878978",
"international": "+55 27 7787-8978",
"national": "(27) 7787-8978",
"e164": "+552777878978",
"rfc3966": "tel:+55-27-7787-8978",
"significant": "2777878978"
},
"regionCode": "BR",
"valid": true,
"possible": true,
"shortPossible": false,
"shortValid": false,
"canBeInternationallyDialled": true,
"possibility": "is-possible",
"type": "mobile",
"typeIsMobile": true,
"typeIsFixedLine": false,
"countryCode": 55
}

According to current rules in Brazil, the area code 27 is:
If it is a landline, it should start with 2 to 8 and be 8 digits long.
If it is a mobile phone, it should start with 9 and be 9 digits long.