Where iPhone 5 fits in the latest lineup of phones, tablets

After weeks of speculation, anticipation and a dose of hype, Apple is widely expected to announce a new smartphone at an event in San Francisco on Wednesday.

Apple isn't saying anything about the topic of the event, but the email invitation it sent to reporters contains a shadow in the shape of a "5'' — a nod to the iPhone 5. It is being held in San Francisco at Yerba Buena Center for the Arts Theater, where Apple has held many product launches.

The new model is expected to work with fourth-generation, or 4G, cellular networks. That capability is something Samsung's Galaxy S III and many other iPhone rivals already have. A bigger iPhone screen is also possible. The new model will likely go on sale in a week or two.

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Apple Inc. also plans to update its phone software this fall and will ditch Google Inc.'s mapping service for its own, as a rivalry between the two companies intensifies.

In a related development, Google said Tuesday that it is releasing a new YouTube app for the iPhone and the iPad. The changes come amid the expiration of a five-year licensing agreement that had established YouTube as one of the built-in applications in Apple's mobile devices.

Still unknown is whether Apple will announce a smaller version of its iPad on Wednesday.

Apple dominates the market for tablet computers, shipping seven out of every 10 tablets worldwide in the second quarter, according to research firm IHS iSuppli. Rivals have been trying to compete by producing smaller, cheaper models —such as Amazon's Kindle Fire. A mini iPad would challenge those relative newcomers.

Sales of Apple's iPhones are still strong, though the company lost the lead in smartphones to Samsung this year. Samsung Electronics Co. benefited from having its Galaxy S III out in the U.S. in June, while Apple was still selling an iPhone model it released last October. A new iPhone will allow Apple to recapture the attention and the revenue.

Amid expectations of a new iPhone, Amazon, Nokia and Motorola all tried to generate interest in their products last week, hoping that a head start on the buzz will translate into stronger sales. Makers of consumer electronics are refreshing their products for the holiday shopping season.

Amazon announced four new Kindle Fire models and a new line of stand-alone e-readers, while Nokia and Motorola unveiled five new smartphones between them.

Nokia and Microsoft, in particular, are trying to generate interest in a new Windows operating system out next month. The two phones announced by Nokia are among the first to run Windows Phone 8.

Here's a look at what to expect in the coming months:

— REKINDLING THE FIRE

Amazon.com Inc.'s 7-inch (17.8-centimeter) Kindle Fire is one of the smaller tablets with decent sales. On Friday, it will sell an updated version with a faster processor, more memory and longer battery life. It will also cut the price to $159, from $199, making it far cheaper than the iPad, which starts at $399 for the 2011 version still on sale. (The most recent ones start at $499.)

Amazon is also releasing higher-end models under the Kindle Fire HD line. A 7-inch (17.8-centimeter) one will go for $199, while an 8.9-inch (22.6-centimeter) one will go for $299. There's also a $499 model that can use the 4G cellular networks that phone companies have been building. A data plan will cost an extra $50 a year. The smaller HD model will start shipping Friday, while the larger ones will be available Nov. 20.

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