T-Mobile USA and MetroPCS are no more. In their place we now find T-Mobile US, the merged entity set to begin trading as TMUS. The Associated Press reported that the acquisition was set to be completed after the closing bell on Tuesday, and the deal is now done; the newly formed entity enters the fray with a market capitalization of about $17 billion. T-Mobile also added 9 million subscribers to its coffers with the deal, so its customer count has now climbed to 43 million — which still makes it the No.4 carrier in the United States. MetroPCS investors are netting $4.08 per share from the deal, and they will also receive half a share of T-Mobile US for each share of MetroPCS common stock they had owned, resulting in a combined 26% stake in the new company.