Any question answered...

cant you just plug the dongle into the ipad?

iPad3G. You put the micro SIM inside :-)

T-Mobile was the best for me. I had an old dongle which came with my daughter's netbook, so I cut it down to the shape of micro SIM - it was a cheap contract, but without limits! There's also one from Three.

I still want to use the dingle so can't cut the sim down to hodge into the iPad. I have a decent monthly allowance for Internet but can't get it unless the supplier can give a vat receipt. I might have to go into the shop and face sales talk!