The indication that the company was facing a tougher time ahead weighed on Ericsson's share price, which fell 5.6 percent to 79.5 kronor in early trading Thursday on the Stockholm stock exchange.
The Stockholm-based manufacturer of telecommunications infrastructure, the world's largest, is struggling in an increasingly competitive environment and has cuts thousands of jobs in Sweden over the past year to slash costs.
Vestberg said Thursday uncertainty still remains in certain parts of the world, although the macroeconomic climate has stabilized in many markets and the "long-term fundamentals in the industry remain attractive."
"Ericsson now sees growth in several European markets and margins are also improving as the network modernization projects gradually come to an end and we engage more in new capacity and LTE business," he said, referring to the high-speed data standard for mobile phones.