AT&T (NYSE:T) ends its bid to acquire T-Mobile (OTCQX:DTEGY), taking a $4B Q4 charge for "break-up considerations." The two plan to enter a "mutually beneficial roaming agreement." T shares -0.5% AH, but Sprint (NYSE:S) - which would have been relegated to a junior league carrier if the deal went through - shoots higher, +8.8%. (PR)