IMO as the pps of TMUS goes up it becomes more favorable to DISH.
What ever Charlie decides to accrue will have a large customer base and a lot of spectrum. TMUS fits this bill.
The only reason I see that Charlie will not make a bid for TMUS is he feels certain that he can't acquire it for what ever reason.
Again IMO Charlie will not acquire Direct TV because it does not have the growth that Charlie wants. He sees wireless as where his POWER and wealth will grow.