2019 FIRST QUARTER FINANCIAL RESULTS UNDER IFRS TO BE RELEASED ON MAY 9, 2019

ATHENS, Greece – April 12, 2019 – Hellenic Telecommunications Organization SA (ASE: HTO, OTC MARKET:HLTOY), the Greek telecommunications provider, announces that it will release its first quarter 2019 financial results under IFRS on Thursday, May 9, 2019, before the opening of the Athens Exchange.

OTE's management will host a conference call at 17:00 (GREECE) / 16:00 (CONTINENT) / 15:00 (UK) /10:00 (EASTERN US) following the release, to review the results.

Details regarding the conference call dial-in and replay numbers as well as the live audio webcast of the conference call, following the results, can be accessed at:  https://ote.irwebpage.com/conference_calls/