(Telecompaper) Twitter reported second-quarter revenues up 20 percent year-on-year to USD 602 million, while its net loss narrowed to USD 107 million from USD 137 million a year ago. Adjusted EBITDA increased 45 percent to USD 175 million, better than the company's outlook. Average monthly active users rose 3 percent year-over-year to 313 million and were up from 310 million in the previous quarter. Around 82 percent of the users accessed the service from a mobile device. Twitter said advertising revenue rose 18 percent in the quarter but it was seeing a continued trend of less advertiser demand and growing competition from other social networks for ad dollars. The weaker market outlook is reflected in the company's outlook for a dip in sales in Q3 to USD 590-610 million, while adjusted EBITDA is estimated at USD 135-150 million.