Andys
it should work, do you wish to use it as 3g or 4g or "3g/4g" ? also, for 4g, you are going to need 6.4.x code loaded, if you are on 6.3, it can only be used as '3g only'.
also - can you confirm it's 4g capable, from what I see online, it may be UMTS 3g only http://www.3g-modem-wiki.com/page/Huawei+E173
regards
-jeff