Subscribers of the top three largest Ukrainian mobile communications operators used twice more traffic during New Year and Christmas holidays than a year ago, according to public materials of the companies. Kyivstar said that on New Year and Christmas its subscribers used twice more Internet traffic in 2018 and made 10% less calls. On December 31 and January 1 the data transfer in the network reached 1,117 terabytes (TB), which is 147% more than last year.