AT&T on Thursday accidentally posted a filing (since pulled, available below) that called into doubt one of the core arguments for its buyout of T-Mobile. While it has publicly said it could only get to 97 percent coverage of the US population with LTE by spending $39 billion to buy T-Mobile, an estimate included in the document instead showed that it would only need $3.8 billion in network expenses to go beyond the 80 percent it wanted otherwise. Senior management claimed that the deal would let it "better absorb the increased capital investment," according to AT&T
