Twitter's stock price continued a recent decline on Wednesday, closing down 3.5 percent after an analyst lowered the short messaging service's rating on concerns that its stock price is too high.
Saudi users of Internet messenger application Viber reported on Saturday that the service was back on their smartphones, despite the authorities insisting it was still banned.
Twitter said Tuesday it overhauled its user display to make the messaging service "more visual," as it ramps up competition against photo-sharing services like Instagram.
A "likely service disruption" struck Facebook on Monday, preventing its 1.15 billion members from updating their status on the social media website.
You can use your telephone to call any other phone in the world. But if you want to place a video call to someone, good luck.
Twitter's losses are mounting as the online messaging service prepares to make its stock market debut.
A start-up specializing in tuning into online banter by TV viewers said Wednesday that it has been bought by Twitter.
If David Huang had left his native Taiwan for Sweden a generation ago, he would have taken a giant leap into the unknown.
Twitter is holding to a "principled" policy on national security data requests and will "push back" in some cases to protect the privacy of its users, its chief executive said Wednesday.
European governments' ability to monitor citizens' online activity on security grounds has increased significantly in recent years.