RadioShack announced that preliminary net sales and operating revenues for the fourth quarter ended Dec. 31, 2011 increased approximately 6% to $1.39 billion compared with $1.31 billion for the fourth quarter last year.

RadioShack's transition from offering T-Mobile products and services to offering those of Verizon Wireless took a toll on the company's third quarter profits, though overall sales managed to increase.

RadioShack has announced that it is celebrating the arrival of Verizon Wireless products and services in more than 4,400 U.S. stores with a series of special offers.

Walmart has sold AT&T iPhones in its store for several years now so it shouldn’t have come as a surprise that the company would be offering the iPhone 4 now that it is available on the Verizon network.

Walmart announced that iPhone 4 on the Verizon Wireless network will be available in select Walmart stores starting Feb. 10.