So another Mobile World Congress is over. As usual, we endured the jostling, the lines and the hype to trawl the stands and interview the key executives, in order to spot the real trends, issues and challenges among the glossy demoes and fixed-grin optimism. MWC is always a strange mixture of a new beginning – Sunday night is really New Year’s Eve for the mobile industry; and Groundhog Day – most stands in the same locations as before, with remarkably similar messages. The 2019 production leaned more to the latter, with very few major announcements or big surprises. Even the Samsung 5G smartphone had been pre-launched the week before in South Korea, and on the network and MNO fronts, most…