An early assumption that 5G would be led first by densification has been challenged in the past year or two by the emergence of Massive MIMO as a major element in many MNOs’ 5G strategies. Operators, particularly in Asia, are looking to use large antenna arrays, combined with beamforming, to add huge amounts of capacity to their existing macrocells, before they move on to deploying large numbers of small cells. European MNOs have been less aggressive about Massive MIMO trials than some of their Asian counterparts, such as Softbank in Japan or China Mobile. But the UK is proving to be an exception. BT’s mobile arm, EE, was an early public exponent of macrosite enhancement as more important, in the…