Telecom Service One : Notice of Board Meeting

Hong Kong Exchanges and Clearing Limited and The Stock Exchange of Hong Kong Limited (the "Stock Exchange") take no responsibility for the contents of this announcement, make no representation as to its accuracy or completeness and expressly disclaim any liability whatsoever for any loss howsoever arising from or in reliance upon the whole or any part of the contents of this announcement.

Telecom Service One Holdings Limited

電 訊 首 科 控 股 有 限 公 司

(Incorporated in the Cayman Islands with limited liability)

(Stock Code: 8145) NOTICE OF BOARD MEETING

The board of directors (the ''Board'') of Telecom Service One Holdings Limited (the ''Company'') hereby announces that a meeting of the Board will be held on Monday, 26 June 2017 for the purpose of, among other matters, approving the release of the final results of the Company and its subsidiaries for the year ended 31 March 2017 and to consider and approve other matters.

By Order of the Board

Telecom Service One Holdings Limited Cheung King Shek

Chairman

Hong Kong, 12 June 2017

As at the date of this announcement, the chairman and non-executive director of the Company is Mr. Cheung King Shek; the chief executive officer and executive director of the Company is Mr. Cheung King Fung Sunny; the non-executive directors of the Company are Mr. Cheung King Shan and Mr. Cheung King Chuen Bobby; and the independent non-executive directors of the Company are Mr. Fong Ping, Ms. Kwok Yuen Man Marisa and Mr. Chu Kin Wang Peleus.

This announcement, for which the directors of the Company collectively and individually accept full responsibility, includes particulars given in compliance with the Rules Governing the Listing of Securities on the Growth Enterprise Market ("GEM") of the Stock Exchange for the purpose of giving information with regard to the Company. The directors of the Company, having made all reasonable enquiries, confirm that to the best of their knowledge and belief: (i) the information contained in this announcement is accurate and complete in all material respects and not misleading or deceptive; (ii) there are no other matters the omission of which would make any statement herein or in this announcement misleading; and (iii) all opinions expressed in this announcement have been arrived at after due and careful consideration and are founded on bases and assumptions that are fair and reasonable.

This announcement will remain on the "Latest Company Announcements" page on the GEM website at www.hkgem.com for at least 7 days from the day of its posting. This announcement will also be published on the Company's website at www.tso.cc.

The English text of this announcement shall prevail over the Chinese text in case of inconsistencies.