1. Procedures for trading DTAC shares on SET and SGX Purchasing DTAC securities in Singapore and selling in Thailand Investors who purchase DTAC shares in Singapore and wish to sell them on the Thai market can choose one of two methods: 1.Withdraw their securities from Central Depository (Pte.) Ltd., (CDP)[1] as securities certificates, then bring the physical certificate to deposit with a securities company in Thailand. The brokerage house will then deposit the certificates with TSD. This process will take about ten to thirteen business days. [1][1] CDP is a securities depository center in Singapore; 4 Shenton Way #02-01 SGX Centre2, Singapore 068807 Tel.65-62368888 Fax.6565350775

2. 2. Withdraw their securities from Central Depository (Pte.) Ltd., (CDP)[1] and ask Lim Associates (Pte.) Ltd. (LIM)[2] in Singapore to inform TSD that they wish to transfer securities to their securities account in Thailand. When contacting LIM, investors should specify:[1][2] a) Their investors’ member account number at a securities company in Thailand, and: b) Their securities company’s depository participant number. This process will take about eight to ten business days. [1][1] CDP is a securities depository center in Singapore; 4 Shenton Way #02-01 SGX Centre2, Singapore 068807 Tel.65-62368888 Fax.6565350775 [2][2] LIM is a securities registrar in Singapore; 3 Church Street #08-01 Samsung Hub, Singapore 049483 Tel. 65-65365355 Fax. 65-65361360 Procedures for trading DTAC shares on SET and SGX

3. SGX-SET Share: Transfer Procedures Option 1: Request for Share Certificate SINGAPORE THAILAND Central Depository (Pte) Ltd. (CDP) DTAC Holder Thailand Securities Depository (TSD) The Stock Exchange of Thailand (SET) Broker 1 2 3 4 5 6 7 Approximately 11-13 business days Share Withdraw al from CDP Share Certificate Issuance & Delivery Share Certificate Deposit through Broker LIM Associates (pte) Ltd. as the registrar of DTAC in Singapore Deposit document delivery to TSD Verify & Confirm Depository Request for Trading Share Transfer Request

4. SGX-SET Share: Transfer Procedures Option 2: Request for Share Transfer through Scripless SINGAPORETHAILAND Central Depository (Pte) Ltd. (CDP) DTAC Holder Thailand Securities Depository (TSD) The Stock Exchange of Thailand (SET) Broker 1 2 3 4 5 6 Approximately 8-10 business days Share Withdrawal from CDP Request for Share Certificate Deposited through Broker LIM Associates (pte) Ltd. as the registrar of DTAC in Singapore Share Transfer Request Share Credit to TSD System Verify & Confirm Depository Request for Trading

5. Purchasing DTAC securities in Thailand and selling in Singapore Since CDP uses the scrip system, investors in Thailand must withdraw their securities in the form of a certificate from TSD’s scripless system and deposit it with CDP to further trade in Singapore. This process will take about fourteen business days.

6. SET-SGX Share Transfer Procedures THAILAND SINGAPORE DTAC Holder Thailand Securities Depository (TSD) 1 2 3 4 5 6 7 Approximately 14 business days Share Withdrawal from TSD Share certificate issue/delivery to broker Share Certificate Deposit with CDP Submit share withdrawal request Share Transfer to CDP Share certificate issue to holder & Deposit with CDP Request for Trading Broker Central Depository (Pte) Ltd. (CDP) SGX LIM Associates (pte) Ltd. as the registrar of DTAC