Advanced Info Service

Advanced Info Service, also known as AIS, is a Publicly Owned company headquartered in Thailand. Founded in 1986, it employs approximately 2,920 individuals and reported $6.9B in revenue as of 2025. The company operates primarily in the telecoms sector, initially starting as a computer rental business. In October 1990, it launched analog 900 MHz mobile phone services, operating under a 20-year monopoly concession granted by the Telephone Organization of Thailand (TOT), and later became the first company authorized to operate on the GSM-900 frequency. Advanced Info Service acquired Shinawatra Paging in June 1992 and operates as Thailand's largest GSM mobile phone operator, serving 39.87 million customers as of Q3 2016.