Three haven't been quite as forward looking unfortunately, their excellent Mifi much to my surprise doesn't seem to support 900Mhz 3G (not that Three will ever get any from O2 or Vodafone anyway!) nor does it support 850Mhz 3G. (Which Three at least have a chance to get their hands on during the 2012 Auction) In fact although it's quad band 2G it only supports 3G on 2100Mhz, which is less than what most handsets support. Opps!