Over a quarter of MetroPCS' customer base is now on LTE (26 percent), and the company made $1.3 billion in revenue for Q4 and $5.1 billion total in 2012 as a result, it said. Though revenue was down for Q4 over last year to $122 million compared to $215 million for Q4 2011, profits were up year-over-year by 10 percent to $824 million, and the company said it made a record $1.5 billion EBITDA (before taxes, etc.) The company attributes that in part to a 2.2 million LTE subscriber bump, an increase of 117 percent over Q3 2012, but indicated that it lost 93 thousand subscribers total over the same period. It added that churn (customers leaving to other carriers) fell to 3.4 percent, its lowest level ever. Meanwhile, the carrier said it's proposed Deutsche Telecom-backed merger with T-Mobile is moving along swimmingly with a definitive proposal filed yesterday. It anticipates "closing the transaction in early April" ahead of schedule, which it says would make MetroPCS "the leading value wireless carrier in the United States."