That extra penny you found under the couch might come in handy to purchase a new phone from AT&T.

Between Black Friday and Cyber Monday next week, AT&T is selling some of its mobile devices online for just one cent. AT&T broke down the offers day by day in its announcement:

Friday, Nov. 25: AT&T said it was offering touchscreen devices, including tablets, starting at unbelievably low prices. However no other details were released.

Saturday, Nov. 26: All Windows 7 and select Android devices will be sold for one cent.

Sunday, Nov. 27: The Blackberry 9860 will be sold for one cent.

Monday, Nov. 28: Smartphones such as the Motorola Atrix, Samsung Infuse, BlackBerry 9810, HTC Inspire and LG Thrill will be sold for one cent each.

We're proud to continue to offer incredible value and savings in this economy, Phil Biernert, senior vice president of AT&T said in a statement. We want to show our customers that we appreciate their loyalty, especially during the holiday season.

Of course, the penny just buys the phone and shipping. All the smartphones do require a voice plan and at least a $15 data plan, while the other mobile devices will require a minimum $20 per month messaging plan. All of the offers will require a two-year service agreement.