ViewSonic to debut Android 4G tablet-phone at CES

Accoridng to Dow Jones Newswires, Viewsonic is preparing to launch a 4-inch Android tablet during the Consumer Electronics Show next week. ViewSonic's tablet is reportedly run on a 4G network and will also be able to place phone calls. Verizon Wireless recently launched its 4G LTE network, Sprint offers a 4G WiMAX network, and T-Mobile also markets its HSPA+ 4G network. It's unclear which carrier…