The fourth quarter financial results and earning a report will be announced, as the company officially stated, on January 30th, 2019. All the details regarding this earning report are in the link below if someone is interested in this matter.
https://business.financialpost.com/pmn/press-releases-pmn/business-wire-news-releases-pmn/att-to-release-fourth-quarter-2018-earnings-january-30