Complex sentence: MetroPCS currently operates the fifth largest mobile telecommunications network in the United States with 9.5 million subscribers as of January 2012, using CDMA technology to offer service in addition to its 4G network using LTE.
Split into simpler sentences: MetroPCS currently operates the fifth largest mobile telecommunications network in the United States with 9.5 million subscribers as of January 2012. MetroPCS uses CDMA technology to offer service in addition to its 4G network using LTE.