Taiwan Mobile Announces Subsidiary Taiwan Fixed Network Acquires Right-of-Use Asset from Verizon Communications Taiwan Branch (Supplementary Announcement: Updated Right-of-Use Asset Amount)

1. Name and nature of the subject property (e.g., land located at Section XX, Subsection XX, North District, Taichung City): Data center in Guishan District, Taoyuan City

2. Date of occurrence: 7/31/2026 ~ 7/31/2026

3. Board approval date: April 16, 2026

4. Other approval dates: Approval level: Chairman authorized management department to proceed per internal management regulations July 31, 2026

5. Quantity of transaction units (e.g., XX square meters, equivalent to XX ping), unit price, and total transaction amount: Rental pricing for server rooms is based on the agreed rate per kilowatt. The total right-of-use asset amount is NT$8,982,728,099. (This update reflects revised asset value due to early leasing of certain floors.)

6. Counterparty and its relationship with the company (if the counterparty is an individual and not a related party, name disclosure may be omitted): Counterparty: Verizon Communications Taiwan Branch Relationship with the company: None

7. If the counterparty is a related party, state the reason for selecting them, the previous transferor, the relationship among the previous transferor, the company, and the counterparty, the previous transfer date, and amount: Not applicable

8. If the subject asset’s owner within the past five years was a related party of the company, disclose the date and price of acquisition and disposal, and the relationship with the company at the time: Not applicable

9. Estimated gain (or loss) on disposal (not applicable for asset acquisition) (if deferred, provide a table showing recognition): Not applicable

10. Delivery or payment terms (including payment periods and amounts), contractual restrictions, and other important agreements: Delivery or payment terms: Monthly payments Lease term: July 1, 2025 – September 30, 2035 Contractual restrictions and other important terms: None

11. Decision method for this transaction (e.g., bidding, price comparison, negotiation), reference basis for price determination, and decision-making unit: Approved by the Board of Directors

12. Name of professional valuation firm or company and valuation amount: 1. Colliers International Real Estate Appraiser Joint Office: NT$8,779,365,367 2. Cushman & Wakefield Real Estate Appraiser Office: NT$8,779,365,367

13. Name of professional appraiser: 1. Colliers International: Ku Chien-Hui 2. Cushman & Wakefield: Yang Chang-Ta

14. Appraiser’s license number: 1. Colliers International Ku Chien-Hui: 96 Taipei City Appraisal No. 000105 2. Cushman & Wakefield Yang Chang-Ta: 96 Taipei City Appraisal No. 000106

15. Whether the valuation report indicates a limited, specific, or special price: No or not applicable

16. Whether the valuation report has not yet been obtained: No or not applicable

17. Reason for not yet obtaining the valuation report: Not applicable

18. If there are significant differences in valuation results, explain the reasons and include auditor’s opinion: Not applicable

19. Name of accounting firm: Not applicable

20. Name of auditor: Not applicable

21. Auditor’s license number: Not applicable

22. Broker and brokerage fees: None

23. Specific purpose or use of the acquisition or disposal: To support long-term IDC business development and strengthen competitiveness in the data center services market, Taiwan Fixed Network plans to enter into a long-term lease agreement with Verizon Communications for the Taoyuan Guishan IDC data center. This ensures stable supply of operational resources, aligns with the company’s overall strategic planning, and enables gradual expansion of high-performance cloud and data services to meet long-term growth demands and customer business expansion.

24. Dissenting opinions from directors regarding this transaction: None

25. Whether this transaction is a related-party transaction: No

26. Date of supervisor approval or audit committee consent: April 16, 2026 – Supervisor approval

27. Whether this transaction involves acquiring real estate or right-of-use assets from a related party: No

28. Valuation price assessed under Article 16 of the “Asset Acquisition and Disposal Rules for Publicly Issued Companies”: Not applicable

29. Valuation price assessed under Article 17 of the same rules if the price under the previous item is lower than the transaction price: Not applicable

30. Previous date(s) of material information disclosure regarding the same event: May 13, 2025 and April 16, 2026

31. Other explanatory matters: Future rental fees may be subject to change (This update) Updated right-of-use asset amount due to early leasing of certain floors