T-Mobile USA announced its fourth quarter 2005 customer results today. The company experienced record growth and lowered churn to make for a total of 21.7 million customers. That still puts them well behind the top three carriers (Cingular, Verizon Wireless and Sprint Nextel) who each have more than 40 million customers.

Important figures from the release:

• 1.4 million net new customers in the fourth quarter 2005
• Annual postpay churn reduced to 2.3% in 2005, from 2.6% in 2004
• 1.1 million converged device users (724K BlackBerry and 367K Sidekick)

Financial details will be announced on March 3rd.