Telkomsel is a brand name of a GSM and UMTS Mobile phone network operator which operates in Indonesia. It was founded in 1995, and is a subsidiary of Telkom Indonesia. The company currently has 122 million subscribers. Telkomsel Operates in Indonesia with GSM 900-1800 MHz, 3G network, and internationally, through 323 international roaming partners in 170 countries (end of September 2008). The company provides its subscribers with the choice between three prepaid cards-simPATI, Loop and Kartu As, or the post-paid kartuHalo service, as well as a variety of value-added services and programs.
As of 31 March 2015, Telkomsel has the leading mobile market share in Indonesia with 46.0% of the total number of mobile customers.
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