In 2009 Lattelecom started offering residential fiber optic services with up to 100 megabits per second high Internet bandwidth. In September 2009 an announcement was made that Lattelecom had upgraded its fiber optic bandwidth up to 1 gigabits per second. Zolitūde was the first residential area in Riga where the Lattelecom fiber optic Internet service was made available (in January 2009), followed later by Kengarags, Purvciems, Plavnieki, Ziepniekkalns and other locations. Jelgava was the first city where fiber optic Internet was made available from areas other than Riga, but late in 2009 the Lattelecom fiber optic service was also made accessible in other cities, such as Daugavpils, Salaspils, etc. Initially, fiber optic network expansion work was carried out in the newly built dwelling areas in Riga and other largest cities of the country the rational being that return on the investment in the development of the network is possible to attain only if the newly connected building has at least 30 apartments.