Three out of five undersea cables connecting Vietnam with the world encountered problems as of June 15, slowing down the internet speed across the country, according to local internet service providers.

February's Speedtest Global Index (SGI) showed that Vietnam jumped up six places to 39th in fixed broadband speeds, despite recent disruptions to all five of its submarine internet cables suffering outages.

Vietnamese internet service providers have confirmed that four out of five submarine internet cables that connect the country to the world are experiencing issues, seriously affecting performance and reliability.