CSG Systems International to Hold 2021 First Quarter Earnings Conference Call on May 5

b'Denver, Colorado--(Newsfile Corp. - April 13, 2021) - CSG \xc2\xae (NASDAQ: CSGS) invites you to participate in a conference call on Wednesday, May 5, 2021 at 5:00pm EDT to discuss the company\'s first quarter 2021 earnings results.