Third generation (3G) and fourth generation (4G) wireless ("4G") mobile wireless technologies allow consumers to access a variety of different mobile services and functionalities, such as web browsing, e-mail, access to application (“app”) stores, video conference or chat, mapping and navigation systems, mobile commerce, and the downloading of content.    A range of different mobile devices include built-in 3G or 4G wireless connectivity, including smartphones, tablets, e-readers, and netbook and laptop computers.  Several mobile network technologies are generally considered to be 3G or 4G, including EV-DO, WCDMA, HSPA, HSPA+, LTE, and mobile WiMAX.