CSG Systems International, Inc. provided earnings guidance for the full year of 2021 and 2022. For the year 2021, the company expects revenue in the range of $1,015 million to $1,045 million and EPS in the range of $2.35 to $2.53. For the year 2022, the company expects revenue in the range of $1,060 million to $1,100 million.