#1台灣大哥大 Taiwan Mobile Taiwan Star Merging into Taiwan Mobile January 3rd, 2022 1#2Disclaimer The information contained in this presentation, including all forward- looking information, is subject to change without notice, whether as a result of new information, future events or otherwise, and Taiwan Mobile Co., Ltd. (the "Company") undertakes no obligation to update or revise the information contained in this presentation. No representation or warranty, either expressed or implied, is provided in relation to the accuracy, completeness or reliability of the information contained herein, nor is the information intended to be a complete statement of the Company, markets or developments referred to in this presentation. 2#3Transaction Summary Issuing c.282M shares to merge Taiwan Star Structure Shareholding Timeline Taiwan Mobile to be the surviving company post merger Taiwan Star shareholders to have c.7.4% stake in TWM Transaction consummation subject to approvals from NCC and FTC 3#4Transaction Rationale Greater Scale Enhanced Customer Satisfaction Significant Synergies Earnings Growth Healthy FCF & Financial Flexibility 4#5Greater Scale & Customer Satisfaction Mobile Subscribers 9.8 7.1 10.7 Unit:M 7.1 Industry 2.1 FET APT TWM post merger TWM Post-merger CHT Source: NCC Statistics as of Oct. 2021 (w/o 040 subscribers) 52 Mobile Service Revenue (estimated IFRS) Unit:NT$bn TWM post merger CHT FET APT LTM LTM LTM 1-3Q21 annualized Spectrum/mobile user (MHz/million user) 20 25 3.5GHz spectrum/mobile user (MHz/million user) Industry TWM post merger 30 8 9 10 11 5#6Source of Synergies Upon Completion of the Integration Business streamlining 20% Customer contribution 31% Network consolidation 49% 6#7Unit: NT$M Year 1 EBITDA Growth and Gearing EBITDA Increments Year 2 Year to Nov. 2021 telecom EBITDA is NT$22.8bn 7,089 Year 1 Year 3 Net Debt to EBITDA Year 3 2.20 2.42 7#8Post Merger Net Profit TWM Post Merger Estimated Increments Unit: NT$M Year to Nov. 2021 Year 1 Year 2 Year 3 8#9Future Focus ➤ Propels future revenue and earnings growth Cements TWM's position in the mobile business with ESG fulfillment ➤ Accelerates Taiwan's 5G service proliferation ➤ Targets total return strategy 9#10台灣大哥大 Taiwan Mobile Thank You 10#11Appendix 11#12TST's P&L NT$M Revenue EBITDA 2019 2020 1H2021 13,125 12,874 6,333 3,028 2,966 1,438 D&A 4,840 5,151 2,792 EBIT (1,812) (2,185) (1,354) Non-operating expense (874) (987) (589) Pre-tax loss (2,686) (3,173) (1,943) Pro forma Pre-IFRS 16 EBITDA 639 594 261 12