The expanded T-Mobile and Dish Network are still hammering out the final details of their deal, which will see Sprint’s Boost prepaid business sold to the satellite TV operator for an initial $1.2bn. But while this arrangement helped secure regulatory approval for T-Mobile USA’s merger with Sprint, once it is activated, the companies will become competitors – even though, until it rolls out its own network at scale, Dish’s main coverage will come from its seven-year MVNO arrangement with TMO. The new TMO has a significant advantage over Dish in terms of established networks, services and user bases, but it has to go through a difficult integration process (see separate item). Meanwhile Dish has spent years collecting spectrum but failing…