Telkomsel is a leading cellular operator in Indonesia, which serves more than 130 million customers, thus representing around 52% amongst big 3 cellular operators at the end of 2013. Operating since 1995, Telkomsel is the subsidiary of PT Telekomunikasi Indonesia Tbk (65%) and Singapore Telecom Mobile Pte Ltd (35%).
More than 40 years ago, Indosat Ooredoo was established as an integrated Indonesian telecommunications network and service provider. Together with its subsidiaries PT Indosat Mega Media (IM2) and PT Aplikanusa Lintasarta, Indosat Ooredoo provides fixed data or Multimedia, Intranet & Data Communication services such as IPVPN, leased line and internet services. Indosat pioneered the introduction of wireless broadband services using 3.5G with HSDPA technology to Indonesia and sucessfully attained a dual listing for its shares in 1994.