If 5G is to deliver on its promises, or even be worth building at all in many markets, it must support a far broader ecosystem, which means more open access to key spectrum and network assets. This issue will be at the heart of regulatory debate and litigation from now until well into the 2020s, and Dish Network has fired the starting gun, with a bid to block Verizon’s acquisition of XO Communications because it would give the US giant unfair control over some key 5G enablers. Satellite TV provider Dish may not have delivered on its own promises to build an LTE network in its spectrum, but it is good at trying to disrupt the status quo for the…