router with cellular connectivity

[AlexF]

I am wondering if there is a router that will let me put in a sim card or something to use cellular connectivity. I want to use it as a backup in case the cable internet goes down. Is this a good idea? How fast will it be?

[Webmaster]

I used one of these when I was configuring a network in a building still under construction. There was no active WAN connection, so I was forced to use a cellular signal:

http://www.cisco.com/en/US/prod/coll...78_498096.html