AT&T's proposed acquisition of T-Mobile was a big deal as soon as it was announced, but now Reuters has unearthed some more context to lend it even more cruciality. We already knew that in the event of AT&T&T-Mobile failing to garner regulatory approval, AT&T would owe Deutsche Telekom, the current owner of T-Mo USA, $3 billion in cash, some spare AWS spectrum, and a roaming agreement "on terms favorable to both parties." Reuters' sleuths say that the spectrum in question is worth $2 billion and the roaming deal a further $1 billion, bringing the total breakup payout to a hair-raising $6 billion. G