[Impact on Chunghwa Telecom’s Financials after the adoption of IFRS As of January 1, 2012, the major differences in Chunghwa’s consolidated financials due to the transition from ROC GAAP to IFRS include a decrease of NT$18,050,922 thousand in retained earnings, an increase of NT$20,621,248 thousand in paid-in capital, a decrease of NT$5,762,753 thousand in unrealized revaluation increment, a decrease of] [Chunghwa Telecom Reports Consolidated Operating Results Taipei, Taiwan, R.O.C. April 30, 2012 - Chunghwa Telecom Co., Ltd. (TAIEX: 2412, NYSE: CHT) (“Chunghwa” or “the Company”) today reported its operating results for the first quarter of 2012. All figures were prepared in accordance with generally accepted accounting principles of the Republic of China (“ROC GAAP”) on a consolidated basis. (Comparisons, unless] [Chunghwa Telecom Co., Ltd. Financial Statements for the Three Months Ended March 31, 2012 and 2011 and Independent Accountants’ Review Report INDEPENDENT ACCOUNTANTS’ REVIEW REPORT The Board of Directors and Stockholders Chunghwa Telecom Co., Ltd. We have reviewed the accompanying balance sheets of Chunghwa Telecom Co., Ltd. as of March 31, 2012 and 2011 , and the related statements of] [Chunghwa Telecom Co., Ltd. and Subsidiaries Consolidated Financial Statements for the Three Months Ended March 31, 2012 and 2011 and Independent Accountants’ Review Report INDEPENDENT ACCOUNTANTS’ REVIEW REPORT To the Board of Directors and Stockholders of Chunghwa Telecom Co., Ltd. We have reviewed the accompanying consolidated balance sheets of Chunghwa Telecom Co., Ltd. and subsidiaries (“the Company”) as of March] [Chunghwa Telecom Co., Ltd. and GAAP Reconciliations of Consolidated Financial Statements for the Three Months Ended March 31, 2012 and 2011 1. 1) Net Income Reconciliation Three Months Ended March 31 2011 2012 NT$ NT$] [4 / 30 Chunghwa Telecom Co., Ltd.]

[To announce the acquisition of KGI Securities Co. LTD. Bonds Date of events: 2011/ 03 /1 5 Contents: 1.Name and nature of the subject matter (if preferred shares, the terms and conditions of issuance shall also be indicated, e.g. dividend yield): KGI Securities Co. LTD. Corporate Bonds (Code: B91007) 2.Date of occurrence of the event:2012/03/15~2012/03/15 3.Volume, unit price, and total] [To announce the acquisition of Fubon Financial Holding Corporate Bonds Date of events: 2011/ 03 / 26 Contents: 1.Name and nature of the subject matter (if preferred shares, the terms and conditions of issuance shall also be indicated, e.g. dividend yield): Fubon Financial Holding Co., Ltd. Corporate Bonds (Code: B97829) 2.Date of occurrence of the event:2012/03/26~2012/03/26 3.Volume, unit price, and] [To announce the board approves the procurement of Project A of NG SDH+OXC Network Equipment and Installation Date of events: 2011/ 03 / 27 Contents: 1.Name and nature of the subject matter (e.g. land located at Sub lot XX, Lot XX, North District, Taichung City):Project A of NG SDH+OXC Network Equipment and Installation for 2012. 2.Date of the occurrence of] [Supplement announcement to announce the board approves the procurement of Project B of NG SDH+OXC Network Equipment and Installation Date of events: 2011/ 03 / 27 Contents: 1.Name and nature of the subject matter (e.g. land located at Sub lot XX, Lot XX, North District, Taichung City): Project B of NG SDH+OXC Network Equipment and Installation for 2012. 2.Date of] [To announce the procurement of Project B of NG SDH+OXC Network Equipment and Installation Date of events: 201 2 / 03 / 27 Contents: 1.Name and nature of the subject matter (e.g. land located at Sub lot XX, Lot XX, North District, Taichung City):Project B of NG SDH+OXC Network Equipment and Installation for 2012. 2.Date of the occurrence of the] [6 The Board resolves the distribution of cash dividend for year 2011 Date of events: 201 2 / 03 / 27 Contents: 1.Date of the board of directors resolution:2012/03/27 2.Type and monetary amount of dividend distribution: The Board of Directors resolved to distribute cash dividend NT$5.4608 per share for year 2011. 3.Any other matters that need to be specified: None] [7 Explanation of the report that the Company’s procurement plan of nearly NT$5 billion for its fiber network is welcomed by Taiwan ICT manufacturers Date of events: 201 2 / 04 / 09 Contents: 1.Name of the reporting media: Commercial Times 2.Date of the report:2012/04/09 3.Content of the report: Chunghwa Telecom planned to invest NT$200 billion on fiber network construction] [8 To announce the Company’s March 2012 revenues Date of events: 201 2 / 04 / 10 Contents: 1.Date of occurrence of the event:2012/04/10 3.Relationship to the Company (please enter “head office” or “affiliate company”):Head office 4.Reciprocal shareholding ratios: N/A 5.Cause of occurrence: Chunghwa Telecom today announced a 0.5% year-over-year increase in unaudited unconsolidated total revenue to NT$15.4 billion in] [9 Chunghwa Telecom April 1 0 , 2012 This is to report the changes or status of 1) Sales volume 2) Funds lent to other parties 3) Endorsements and guarantees 4) Financial derivative transactions for the period of Mar 201 2 1) Sales volume (NT$ Thousand) Period Items 201 2 201 1 Changes % Mar Invoice amount 15,462,568 16,156,920 (-)694,352] [4 /1 1 Chunghwa Telecom Co., Ltd.]

[99.1 Announcement for the Convention of 201 2 Annual General Shareholders’ Meeting of Chunghwa Telecom Co., Ltd. Taipei, Taiwan, R.O.C. April 3 , 201 2 — Chunghwa Telecom Co., Ltd (TAIEX: 2412, NYSE: CHT) (“Chunghwa” or the “Company”), today announced that the Company will hold its annual general shareholders’ meeting (the “Meeting”) at Chunghwa Telecom Training Institute (No.168, Minzu Road,] [99.2 A nnouncement regarding the Company’s annual general meeting on June 22 , 201 2 1.Date of the board of directors resolution:201 2 /0 2 /2 1 2.Date for convening the shareholders’ meeting:201 2 /06/2 2 3.Location for convening the shareholders’ meeting: Chunghwa Telecom Training Institute (No. 168, Minzu Road, Banc h iao District , New Taipei C i ty,] [4 / 03 Chunghwa Telecom Co., Ltd.]

[Chunghwa Telecom Co., Ltd. Financial Statements for the Years Ended December 31, 2011 and 2010 and Independent Auditors’ Report INDEPENDENT AUDITORS’ REPORT The Board of Directors and Stockholders Chunghwa Telecom Co., Ltd. We have audited the accompanying balance sheets of Chunghwa Telecom Co., Ltd. as of December 31, 2011 and 2010, and the related statements of income, changes in stockholders’] [Chunghwa Telecom Co., Ltd. and Subsidiaries Consolidated Financial Statements for the Years Ended December 31, 2011 and 2010 and Independent Auditors’ Report INDEPENDENT AUDITORS’ REPORT To the Board of Directors and Stockholders of Chunghwa Telecom Co., Ltd. We have audited the accompanying consolidated balance sheet of Chunghwa Telecom Co., Ltd. and subsidiaries (“the Company”) as of December 31, 2011 and] [3 / 28 Chunghwa Telecom Co., Ltd.]