Telkomsel is an Indonesian cellular telecommunication company with over 30 millions subscribers. It is a subsidiary of PT Telkom. Telkomsel is the biggest GSM provider in Indonesia and the first company in Asia that offered GSM prepaid service. For more information please visit www.telkomsel.com

Indosat is an Indonesian telecommunications company. It was established in 1967 as a foreign investment company. It is the second largest provider of wireless services in Indonesia with over 16 millions subscribers, through its three brands, Matrix, Mentari, and IM-3. Indosat is the primary provider of international telecommunications services. For more information please visit www.indosat.com

XL is an Indonesian telecommunications. It is one of a member of the TMI group of companies. It is the third largest provider of wireless services in Indonesia with over 13 millions subscribers. XL is offering both 2.5G and 3G services on its Xplor postpaid and Bebas and Jempol prepaid brands. For more information please visit www.xl.co.id

Flexi is an Indonesian cellular telecommunication company with over 3 millions subscribers. It is a subsidiary of PT Telkom. Flexi is the biggest CDMA provider in Indonesia. For more information please visit www.telkomflexi.com

Esia is an Indonesian cellular telecommunication company with over 3 millions subscribers. It is a mobile subsidiary of PT Bakrie Telecom. Esia is one of the leading CDMA providers in Indonesia. For more information please visit www.esia.co.id

Maxis Communications is the biggest mobile phone service provider in Malaysia with over 8 millions subscribers. It was started in the year 1995. Their mobile services are provided over the 900 & 1800 MHz GSM band and as July 2005, the 2100 MHz UMTS band. For more information please visit www.maxis.com.my

DiGi Telecommunications is a one of the leading mobile phone service provider in Malaysia with over 7 millions subscribers. It is owned in majority by Telenor ASA of Norway. DiGi is the first Telco in Malaysia to launch and operate a fully digital cellular network. DiGi is also the first to offer GPRS (2.5G) and later EDGE (2.75G) in Malaysia. For more information please visit www.digi.com.my

Celcom is the oldest mobile telecommunications company in Malaysia with over 6 millions subscribers. Celcom is one of a member of the TMI group of companies. Celcom is offering both 2.5G and 3G services on its Minutes postpaid and Xpax prepaid brands. For more information please visit www.celcom.com.my

Grameenphone is a GSM-based cellular operator in Bangladesh. Grameenphone started operations on March 26, 1997. It is partly owned by Telenor and Grameen Telecom. Grameenphone is the largest mobile phone company in Bangladesh with over 17 millions subscribers. It is also one the fastest growing cellular telephone network in Bangladesh. For more information please visit www.grameenphone.com

Banglalink is the second largest GSM-based cellular service provider in Bangladesh with over 7 millions subscribers. It is a wholly owned subsidiary of Orascom Telecom. It offers both prepaid and postpaid service to its subscribers. For more information please visit www.banglalinkgsm.com

AKTEL is a joint venture between Telekom Malaysia International Berhad of Malaysia and a local company A. K. Khan & Company Ltd. AKTEL launched its operations on the 15 November, 1997 in Dhaka. AKTEL is the third largest mobile phone operator in Bangladesh with over 6 millions subscribers. AKTEL boasts of the widest international roaming service in the market, connecting 315 operators across 170 countries. It is the first operator in the country to introduce GPRS to its subscribers. AKTEL uses GSM 900 MHz standard. For more information please visit www.aktel.com

Vinaphone is a one of the leading mobile phone service provider in Vietnam with over 9 millions subscribers. It is operated under 900 MHz GSM in June 1996. Vinaphone offers both prepaid and postpaid services. GPRS (2.5G) also provided to all subscribers. For more information please visit www.vinaphone.com.vn

Viettel Mobile is the biggest mobile phone service provider in Vietnam with over 12 millions subscribers. It is operated under 900 MHz GSM in January 1998. Vinaphone offers both prepaid and postpaid services. GPRS (2.5G) also provided to all subscribers. For more information please visit www.viettelmobile.com.vn

Mobifone is a one of the leading mobile phone service provider in Vietnam with over 10 millions subscribers. It is operated under 900 and 1800 MHz GSM in April 1993. Mobifone offers both prepaid and postpaid services. GPRS (2.5G) also provided to all subscribers. For more information please visit www.mobifone.com.vn