- 24 October 2007: Viettel Global Investment Joint Stock Company was established with an initial charter capital of VND960 billion under the business registration certificate No.0102409426 issued for the first time by Hanoi Department of Planning and Investment;
- January 2008: Granted with the investment certificate in Cambodia;
- February 2008: Signed the joint venture contract with Lao Asian Telecom (LAT) to establish Star Telecom Co., Ltd, in which Viettel contributed to 49% of the total charter capital;
- February 2009: Inaugurated telecommunication service in Cambodia;
- 16 April 2009: Increased the charter capital to VND3,000 billion;
- October 2009: Inaugurated telecommunication service in Laos;
- 16 October 2009: Became a public company;
- February 2010: Established Viettel Overseas Co.,Ltd to invest in the Republic of Haiti;
- November 2010: Won the bidding package for telecommunication investment in Mozambique;
- 12 March 2012: Increased the charter capital to VND6,219 billion;
- September 2011: Inaugurated telecommunication service in Haiti;
- May 2012: Inaugurated telecommunication service in Mozambique;
- July 2012: Won the bidding package and took investment certificate in East Timor;
- December 2012: Won the bidding package and took investment certificate in Cameroon;
- March 2013: Inaugurated telecommunication service in East Timor;
- August 2013: Put into operation under the model of a corporation with charter capital up to VND12,438,112,000,000;
- February 2014: Granted with the investment certificate in the Republic of Burundi;
- 16 May 2014: Increased the charter capital to VND12,438 billion;
- September 2014: Inaugurated telecommunication service in Cameroon;
- 17 December 2014: Increased the charter capital to VND14,438 billion;
- 05 December 2017: Increased the charter capital to VND22,438 billion;
- 25 September 2018: Traded on the UPCOM market;
- 30 October 2018: Increased the charter capital to VND30,438,112,000,000;
