T-Mobile USA announced today that it has surpassed 20 million customers. The company has doubled its customer base over the past 10 quarters.

“I personally thank our 20 million customers for their continued loyalty to T-Mobile, and for recommending T-Mobile to family and friends,” said Robert Dotson, President and Chief Executive Officer, T-Mobile USA.

T-Mobile still faces serious competition since all other national carriers are now over 40 million customers.