HLTOF - Hellenic Telecommunications Organization S.A. 2021 Q1 - Results - Earnings Call Presentation May, 12 2021 08:47 AM Hellenic Telecommunications Organization S.A. The following slide deck was published by Hellenic Telecommunications Organization S.A. in conjunction with their 2021 Q1 earnings call. For further details see: Hellenic Telecommunications Organization S.A. 2021 Q1 - Results - Earnings Call Presentation