Fitch Ratings has affirmed Thailand-based telecommunications company Advanced Info Service Plc’s (AIS) long-term foreign and local-currency Issuer Default Ratings (IDR) at “BBB+'” with a stable outlook.

Fitch Ratings (Thailand) on Monday affirmed WHA Utilities and Power’s national long-term rating and the national long-term rating on its outstanding senior unsecured debentures at “BBB+(tha)”.