Sri Lanka Telecom PLC (Sinhala: ශ්‍රී ලංකා ටෙලිකොම්, romanized: Śrī Laṃkā Ṭelikom, Tamil: ஸ்ரீலங்கா டெலிகொம்), doing business as SLT-MOBITEL, is the national telecommunications services provider in Sri Lanka and one of the country's largest companies[3] with an annual turnover in excess of Rs 100 billion.

Since then, Sri Lanka Telecom passed several milestones, including corporatisation in 1991 and privatizsation in 2000 with the collaboration of Nippon Telegraph and Telephone Corporation (NTT) and listing on the Colombo Stock Exchange's Milanka Price Index.

Originally a collaboration between Sri Lanka Telecom and Telstra, Mobitel has been wholly owned by SLT since November 2002.

With this enhancement, Mobitel embarked on a field trial of 3G at the 1st International Buddhist Conference held in 2006, setting the stage for the launch of its 3G services in Sri Lanka.

The company launched its VDSL2 and FTTH/FTTB broadband services on 2014 March 25 and are available in most urban areas in the country within 2 kilometres (1.2 mi) of an upgraded Telephone Exchange's MSAN Unit.

SLT-MOBITEL also provides free and pay as you go WiFi internet access at public places in Colombo and other selected cities in Sri Lanka.