Year-on-year OIBDA margin improved primarily due to the reductions in equipment subsidies in connection with the new unlimited Value plans.

ENGADGET: T-Mobile lost more customers in Q4, will launch LTE in 2013 with AWS spectrum from AT&T

Sequentially, adjusted OIBDA decreased as a result of lower service revenues driven by branded customer losses and higher customer acquisition expenses.

ENGADGET: T-Mobile lost more customers in Q4, will launch LTE in 2013 with AWS spectrum from AT&T

Year-on-year, adjusted OIBDA increased as a result of reduced losses from equipment subsidies due to the launch of the unlimited Value plans and continued cost management programs.

ENGADGET: T-Mobile lost more customers in Q4, will launch LTE in 2013 with AWS spectrum from AT&T