T-Mobile USA, operated by Deutsche Telekom, and MetroPCS have agreed to merge under the T-Mobile name. Expected to close in the first half of 2013, the deal would move over 9 million MetroPCS subscribers to T-Mobile's GSM network and repurpose the existing MetroPCS CDMA network for 4G LTE. It's another try at a merger for T-Mobile after its failed agreement with AT&T, and one that's less likely to be shot down by US regulators.