dan: is there a SIM card in the unit? if yes can i pop out the broadband sim card and put in a standard skinny sim card with standard data on it so it could be used in other locations? ie travelling
Yes you can put any non locked SIM in there - void warranty bla bla warning of course. You then need to add an APN for the SIM card you use e.g. I've tested with a Vodafone SIM and this works fine using APN: vodafone. However, inserting another provider RBI SIM = fail due to SIM lock. I will test this with a Spark Rural Broadband SIM soon too.
Also router is locked to acquire 4G networks only, so if no 4G available you are out of luck.