Thanks very much for the reply and the welcome James!
Seriously!? There's no way to purchase/order a SIM on its own!? Why's that?
Thanks for the advice.
However ... the main reason for using a router is to get away from the limitations and problems of plugging a modem directly into a laptop: The router solution allows passengers to share files and an internet connection the moment they are in range of the WiFi, without having to plug anything in or install/run anything. Plus the 'installed' modem makes using an installed external aerial simpler (this particular vehicle has an all-aluminium body which means that signal reception for mobile phones, broadband, satnav, etc are greatly attenuated if an external aerial is not used).
I have been using this configuration for a few months now, with good results. I have no problems configuring router ports either (I'm a network engineer and 'IT guy', so configuring routers is something I'm very familiar with). I appreciate that you cannot guarantee that the SIM would work with the modem (though it works fine with both 3 and O2 SIMs), and I'm willing to take that chance to try it (assuming I can get hold of a Vodafone SIM somehow!) - I just wondered if there are any known issues or experiences using Vodafone SIMs/modems with a Netgear 3G router.
Anyway, if the SIMs aren't available I guess it's a bit of a non-starter!
Do you know when the SIMs will be available?
Also, I've seen the SIMs for sale on the likes of eBay. Can we assume that such SIMs are in fact incorrectly described mobile phone SIMs rather than mobile broadband SIMs?
Thanks again