2018 SECOND QUARTER FINANCIAL RESULTS UNDER IFRS TO BE RELEASED

ON AUGUST 9, 2018

ATHENS, Greece – July 19, 2018 – Hellenic Telecommunications Organization SA (ASE: HTO, OTC MARKET: HLTOY), the Greek telecommunications provider, announces that it will release its second quarter 2018 financial results under IFRS on Thursday, August 9, 2018.

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/