AT&T's failed acquisition was the best thing to ever happen to T-Mobile. As a consequence of the failed merger, the fourth place wireless carrier received AWS spectrum in over 100 markets, a cash payout in the billions and an extensive roaming agreement with Ma Bell. All of which pushed the last place carrier into a stronger competitive standing. Now, as it nears the completion of a merger of its own devising with MetroPCS, the operator's gearing up to make good on its LTE promise. Starting today, an over-the-air update will begin rolling out to existing Galaxy Note II handsets that enables the previously dormant LTE radio. Which, if you've been keeping close tabs on Magenta's LTE plans, falls right on schedule with its previously announced 2013 deployment timeline.