The top item in the shot below is the wifi 'Router' I've bought.
The bottom one is a mobile internet 'Dongle'. It has a mobile phone sim card in it.
I can connect to the Router via the wifi on my tablet.
Once the Router has the Dongle plugged in, it let's me onto the internet.
The router has a re-chargeable battery in it. This makes the whole lot portable
@OC, Not particularly posted for you. But if us geeks don't share info
@All, BTW, the Dongle says Vodafone, but I unlocked it and put another sim card in.
That's another story. Ask if you need more info.