Taiwan Mobile: Announcement by Subsidiary Taiwan Fixed Network on Acquiring a Right-of-Use Asset from VNET Taiwan Branch (Supplementary Announcement on Signing Supplemental Agreement)

1. Name and Nature of the Subject Matter (e.g., land in XX section, XX subsection, Taichung City North District): IDC Data Center in Guishan District, Taoyuan City 2. Date of Occurrence: 2026/4/16~2026/4/16 3. Board of Directors Approval Date: April 16, 2026 4. Other Approval Date: Not applicable 5. Transaction Quantity (e.g., XX square meters, equivalent to XX ping), Price per Unit, and Total Transaction Amount: The data center lease conditions are priced based on the agreed-upon rent per kilowatt. The total amount of the right-of-use asset is NT$8,978,650,923. (This update is due to the early leasing of some floors, updating the right-of-use asset amount) 6. Counterparty and its Relationship with the Company (If the counterparty is a natural person and not a related party of the company, their name may be omitted): Counterparty: VNET Taiwan Branch, Relationship with the company: None 7. If the counterparty is a related party, the reason for selecting the related party as the transaction object, the previous owner, the relationship between the previous owner and the company and the counterparty, the previous transfer date, and the transfer amount should also be announced: Not applicable 8. If the owner of the transaction subject matter has been a related party of the company within the past five years, the acquisition and disposal dates, prices, and relationship with the company at the time of the transaction should also be announced: Not applicable 9. Estimated Disposal Profit (or Loss) (Not applicable to asset acquisition) (If deferred, explain the recognition status in a table): Not applicable 10. Delivery or Payment Terms (including payment period and amount), Contractual Restrictions, and Other Important Agreements: Delivery or Payment Terms: Monthly payment, Lease Term: 2025/7/1~2035/9/30, Contractual Restrictions and Other Important Agreements: None 11. Method of Determining this Transaction (e.g., bidding, price comparison, or negotiation), Basis for Price Determination, and Decision-Making Unit: Approved by the Board of Directors 12. Name of Professional Appraiser Firm or Company and its Appraisal Amount: 1. Colliers International Valuation Office: NT$8,779,365,367, 2. DTZ Debenham Tie Leung Valuation Office: NT$8,779,365,367 13. Name of Professional Appraiser: 1. Colliers International: Ku Chien-Hui, 2. DTZ Debenham Tie Leung: Yang Chang-Ta 14. Professional Appraiser's License Number: 1. Colliers International Ku Chien-Hui: 96北市估字第000105號, 2. DTZ Debenham Tie Leung Yang Chang-Ta: 96北市估字第000106號 15. Is the appraisal report for a limited price, specific price, or special price: No or Not applicable 16. Has the appraisal report not yet been obtained: No or Not applicable 17. Reason for not yet obtaining the appraisal report: Not applicable 18. If there is a significant difference in the appraisal results, the reason for the difference and the accountant's opinion: Not applicable 19. Name of Accounting Firm: Not applicable 20. Name of Accountant: Not applicable 21. Accountant's License Number: Not applicable 22. Broker and Brokerage Fees: None 23. Specific Purpose or Use of Acquisition or Disposal: To develop a long-term IDC business sales layout, to strengthen the company's layout and competitiveness in the data center service market, it is planned to sign a long-term lease agreement for the Taoyuan Guishan IDC data center with VNET, to ensure a stable supply of future operational resources, and to cooperate with the company's overall strategic planning, gradually expanding the high-performance cloud and data service footprint to support long-term growth needs and customer business expansion. 24. Opinions of dissenting directors on this transaction: None 25. This transaction is a related party transaction: No 26. Date of approval by supervisors or audit committee: Approved by supervisors on April 16, 2026 27. This transaction is an acquisition of real estate or its right-of-use asset from a related party: No 28. Price assessed according to Article 16 of the 'Regulations Governing the Acquisition or Disposal of Assets by Public Companies': Not applicable 29. If the price assessed in the preceding item is lower than the transaction price, the price assessed according to Article 17 of the same regulations: Not applicable 30. Date of previous significant announcement on the same matter: May 13, 2025 31. Other explanatory matters: Subsequent rent may change. (This update) A supplemental agreement will be signed with VNET Taiwan Branch, with some floors leased earlier.