Despite icy temperatures in New York on Thursday morning, people eager to buy an iPhone that is compatible with Verizon’s wireless network filed into Apple and Verizon stores.

Thursday is the first day that the iPhone is widely available for sale from a wireless carrier other than AT&T in the United States. Verizon and Apple started selling the Verizon version of the iPhone in their stores around the country at 7 a.m., as well as in their online stores. Best Buy and several hundred Wal-Mart stores also planned to have the phone. Photos on Twitter showed modest lines at some stores; here is a roundup.

Damon Darlin, The Times’s technology editor, reports that in downtown San Francisco, nearly two dozen anxious iPhone customers were queued up outside of a Verizon store as early as 6:45 a.m. Only two people were sitting outside the city’s flagship Apple store half a block away. At that location, the camera crews outnumbered iPhone buyers.

Yahoo on Thursday announced the debut of Livestand, a publishing platform that aims to deliver personalized content to mobile devices. As The New York Times first reported on Sunday, the platform, a digital newsstand, will offer a continuous stream of programming based on users’ interests. Yahoo plans to push the platform across multiple formats, including tablets, smartphones, and Web browsers, according to the company’s press release.

“Adoption of tablets and mobile phones is exploding, and digital media isn’t keeping up,” Yahoo’s chief product officer, Blake Irving, said in the release. “Livestand is an immersive environment that provides a dynamic and personalized experience for consumers, and a pipeline of fresh and active content for publishers and advertisers,” he added.

The platform, which will be available on the iPad and on Android tablets in the first half of this year, will also take into account a user’s location and the time of day. Initially, Livestand will draw from Yahoo’s content library, a vast portfolio that includes Yahoo News and Flickr, but eventually, it will be available to third-party publishers.

The project, initially named “Deadeye,” is part of a move by Yahoo to expand its mobile presence. In Yahoo’s last earnings call, in late January, Carol A. Bartz, the company’s chief executive, told investors to brace for a new wave of mobile apps. The company is focusing, she said, on reaching users “no matter what device or operating system they’re on.”

BARCELONA — The new tablet PCs are everywhere around the showroom floors of the Mobile World Congress in Barcelona this week.

Most have many features in common: lustrous, gleaming surfaces, svelte shapes, speedy processors and a version of Android’s mobile operating system. They also tend to share another attribute: No visible price tag.

However, Huawei, a Chinese hardware manufacturer, is hoping to distinguish itself and raise the bar among competitors by being up front on that particular detail.
Huwaei hopes to bring tablets costing around $300 to retail outlets like Best Buy by the middle of the year.Jenna Wortham/The New York Times Huwaei hopes to bring tablets costing around $300 to retail outlets like Best Buy by the middle of the year.

During the weeklong conference this week, the company showed off a suite of tablets that the company says will be priced around $300.

One tablet, called the S7 Slim, is a rectangular tablet running on Android with a 7-inch display, cameras mounted on both the front and the back, along with a 1-gigahertz processor. Huawei also had a squarer tablet, along with a larger, 10-inch model that closely resembled the form of the iPad.

“We’re not yet in the minds of most U.S. consumers, but may we can get in there by starting at the price point,” said Alix Khadiri, a spokesman for Huawei who works for the company’s marketing division in France.