The big difference between home wirelss broadband and mobile broadband is the modem you use. Home wireless broadband plans work with large WiFi modems like you’d get with an NBN plan. These modems can connect more users to WiFi at the same time and have Ethernet ports for directly plugging in computers. But the modem needs to be plugged into the wall for power, and it doesn’t have a battery, so you can’t take it on the bus with you. Mobile broadband modems are exactly the opposite. The best pocket WiFi and WiFi dongles are small enough to slip in your pocket and have batteries so you can keep your connection when you’re out and about, but are mostly designed for a single user. Mobile broadband plans also tend to have smaller download allowances, but uncapped speeds.