A record 700 million smartphones shipped last year, with Samsung and Apple together accounting for …

AT&T posted a narrower fourth-quarter loss, which was again weighed down by a change in the valuation of its employee pension plan. Reporting results today, the company, however, added 780,000 contract subscribers in the period, and sold a record 10.2 million smartphones, of which 8.6 million were iPhones. AT&T posted a loss of $3.9 billion, or 68 cents a share, …

Now playing: Watch this: Get started with Vine 4:10 Screenshot by Sharon Vaknin/CNET As a social network built on keeping things short and sweet, it’s no surprise that Twitter released today a secondary app that lets users (Twitter and otherwise) shoot and upload 6-second videos. Of course, no later than a few hours after its launch, Vine was already being …