Walmart has officially announced today that the iPhone 3G will go on sale at 2500 Walmart stores on December 28, 2008.

The retailer will offer the black 8 GB iPhone 3G model with the every day price of $197 and the 16 GB black or white model for $297, with a new two-year service agreement from AT&T or qualified upgrade. As America’s price leader, Walmart’s price match policy also allows stores to match the price of any local competitor’s advertised store price on the same item within the same promotional period.

“We are delighted to bring customers this ground-breaking mobile technology,” said Gary Severson, senior vice president, Entertainment, Walmart. “Our electronics associates have been preparing for many weeks for the arrival of iPhone 3G. We are excited to now help new customers learn more about the features and services that make the iPhone unique.”

The new iPhone 3G combines all the revolutionary features of iPhone plus 3G networking that is twice as fast, built-in GPS for expanded location-based mobile services, and iPhone 2.2 software which includes support for Microsoft Exchange ActiveSync and runs over 10,000 third party applications available through the new App Store.

Customers can find more information and assistance at the Apple iPhone 3G kiosks located at the Walmart Connection Center in the Home Entertainment department. Electronics associates are ready to assist customers with purchase questions, demonstrations and activation.