Dish had long talked about its desire to entire the mobile game, but there’s a definite air of discomfort in the wake of the T-Mobile-Sprint deal. Dish is now being compelled to build a 5G network, in a very turbulent infrastructure market, and all the while its core satellite TV business is underperforming. Having invested or financed at least $26bn in wireless assets over the past 12 years, Dish is under intense pressure from shareholders to start to monetize these assets, either by generating revenue or by selling on some of its spectrum. That choice has been complicated by Dish’s acquisition, for $1.4bn, of the Boost Mobile MVNO business from T-Mobile, together with various network assets. That means Dish has…