I’ve told you plenty that this year, one of the big narratives, one of THE big stories... will be 5G. But what exactly IS 5G? Well, I spoke to Peter Linder, the head of 5G marketing, and evangelist at Ericsson. Here are all the answers to your questions, to prepare us for Mobile World Congress, which is coming later this month, and where all of this 5G stuff might finally begin to happen. For real.