Telecom Service One : Appointment of Independent Non-executive Director, Chairman of Audit Committee and Members of Nomination Committee and Remuneration Committee

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)

APPOINTMENT OF INDEPENDENT NON-EXECUTIVE DIRECTOR,

CHAIRMAN OF AUDIT COMMITTEE,

MEMBERS OF NOMINATION COMMITTEE AND

REMUNERATION COMMITTEE

The board of directors (the "Board") of Telecom Service One Holdings Limited (the "Company") is pleased to announce that Mr. Tso Ka Yi ("Mr. Tso") has been appointed as an independent non-executive director, the chairman of audit committee and a member of each of nomination committee and remuneration committee of the Company with effect from 15 January 2018.

Mr. Tso Ka Yi, aged 53, is currently a director of Mandarin Kopitiam Management Limited, a company focuses on the franchise business of a Singaporean famous kopitiam brand "Killiney" in Hong Kong. From January 2011 to December 2013, he served as a chief financial officer of Mandarin International Limited, a master franchisee of "Killiney". Afterwards, he was appointed as director of Mandarin International Limited from December 2013 to September 2017. He joined Ernst & Young Tax Services Limited as junior accountant in December 1990 and left the company as a senior manager in December 1999. Mr. Tso graduated from The Chinese University of Hong Kong with a Bachelor's degree of Business Studies in 1987. In 2005, he also obtained a Master's degree of Management and a Bachelor's degree of Arts (Japan Studies) from Massey University in New Zealand. Mr. Tso is a member of the Hong Kong Institute of Certified Public Accountants and a fellow member of the Association of Chartered Certified Accountants.

Mr. Tso has entered into an appointment letter with the Company for a term of two years commencing from 15 January 2018 subject to retirement from office and re-election at the first annual general meeting of the Company after his appointment and subsequently subject to retirement from office by rotation and re-election at the annual general meeting of the Company and vacation of office in accordance with the articles of association of the Company. Mr. Tso is entitled to a directors' remuneration of HK$120,000 per annum, which was determined with reference to the duties and responsibilities of an independent non-executive director and the current prevailing market conditions and practice.

Save as disclosed above, Mr. Tso has not at any time during the three years preceding the date of this announcement served nor is currently serving as a director of any other publicly listed companies in Hong Kong or overseas. Mr. Tso also confirms that he does not hold other positions with the Company or any other member of the Company and its subsidiaries.

As at the date of this announcement, Mr. Tso confirms that he does not have any interests in the shares of the Company within the meaning of Part XV of the Securities and Futures Ordinance (Chapter 571 of the Laws of Hong Kong) and has no relationships with any directors, senior management, substantial shareholders, or controlling shareholders of the Company.

Save as disclosed in this announcement, the Board is not aware of any other information that are required to be disclosed pursuant to paragraphs (h) to (v) of Rules 17.50(2) of the Rules Governing the Listing of Securities on the Growth Enterprise Market of the Stock Exchange (the "GEM Listing Rules") or any other matters relating to the appointment of Mr. Tso as an independent non-executive director that need to be brought to the attention of the shareholders of the Company.

The Board would like to express its warm welcome to Mr. Tso for joining the Board.

By Order of the Board

Telecom Service One Holdings Limited

Cheung King Shek

Chairman

Hong Kong, 11 January 2018

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 and Ms. Kwok Yuen Man Marisa.

This announcement, for which the directors of the Company collectively and individually accept full responsibility, includes particulars given in compliance with the GEM Listing Rules 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 atwww.hkgem.comfor at least 7 days from the day of its posting. This announcement will also be published on the Company's website atwww.tso.cc.

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