Ericsson knows a thing or two about mobile. The company may have exited the handset business recently but it is still the largest manufacturer of telecommunications network equipment in the world. The firm on Monday released its annual mobile market forecast, in which it estimated that the total number of mobile subscriptions will balloon to 9.3 billion by 2019. Of those, Ericsson estimates that 5.6 billion devices will be smartphones, AP reported. The company also believes annual smartphone data traffic will grow to 10 billion gigabytes by 2019 and that videos will account for half of all mobile data traffic. Smartphones currently account for between 25% and 30% of total global mobile subscriptions, but Ericsson thinks that figure will grow to about 60% by 2019.