I think another poster finally discovered (and this seems to bear fruit) that each store had a pre-identified number of Sprint, Verizon, and ATT N4 devices available for pre-order. Once the store exhausted its supply of that number, pre-orders were no longer available. There were not any stores in my immediate area with any N4 pre-order for any carrier. I didn't do an exhaustive search, because time and gas is money, and at some point the BB value would decline the most gas/time I wasted trying to find a store that had available units left for my carrier. Honestly, I think it's a pretty silly way to allocate this sort of inventory (stuff that's not out on the floor, but shipping from some warehouse) but OK.