Top tier operators are naturally reluctant for the traditional auction method of allocating primary spectrum to be abandoned because it helps to sustain their dominance. But they risk being caught on the wrong side of history, or at any rate failing to exploit a growing trend towards spectrum sharing. Ultimately, sharing is the most efficient way of allocating a precious resource among all parties that need to use it. It is true major operators have been using dynamic spectrum for some years to help introduce LTE or 5G services over bands previously assigned say, to 3G. Deutsche Telekom for example hived off 5 MHz from its 3G spectrum in the 2.1 GHz band for sharing with both LTE and 5G.…