Which are the best internet backup dongle 5G router services?

A USB dongle plugs into one laptop and gives just that device internet over a SIM — the simplest, cheapest backup. A MiFi (or "pocket hotspot") is a small battery-powered device that turns one SIM's data into WiFi for several devices at once, so it's great for backup and travel. A 5G router is a bigger, faster version — more range, more devices and higher speeds, often mains-powered for a home or office. Which is right depends on how many devices you need to cover and how fast.