Tele2 Eesti of Estonia has revealed that it has successfully tested three carrier aggregation technology to boost download speeds on its LTE-Advanced (LTE-A) 4G mobile network to up to 375Mbps. The cellco plans to launch the technology in the north of Estonia this week, before an expansion to the country’s major cities in the first quarter of 2016. At present, the only handset which supports the new download speeds is the Samsung Galaxy S6 Edge+. The latest trials used 50MHz of bandwidth across the 800MHz, 1800MHz and 2100MHz bands, with the operator saying it has the potential to improve peak theoretical speeds to 450Mbps in the future by using a different combination of frequencies. According to TeleGeography’s GlobalComms Database, Tele2 is the smallest of Estonia’s three mobile network operators, with around a quarter of all subscribers at the end of June 2015.