Igor Escobar Jquery Input Mask 11 digitos telefones

mask.js

 var maskBehavior = function (val) {
            return val.replace(/\D/g, '').length === 11 ? '(00) 00000-0000' : '(00) 0000-00009';
        },
        options = {onKeyPress: function(val, e, field, options) {
                field.mask(maskBehavior.apply({}, arguments), options);
            }
        };

    $('.phone').mask(maskBehavior, options);