Mobile routers, also known as 3G Routers or Cellular routers, are routers that provide shared Internet access by incorporating a cellular data modem as WAN interfaces. It facilitates the communication between local area network (generally, Ethernet and WiFi) and the Internet via the mobile system. They can be deployed as a primary WAN link to a location where wired connections are not cost-effective, and can also be used as a secondary or business continuity plan should the primary cabled link fail. Cellular routers range from simple SOHO network oriented devices through rugged industrial units with advanced features.

The access point is a device in WLAN to help users to access the local area network.