Details released on OpenSignal's site states that 8 different cities in the US are currently testing hubs for T-Mobile's LTE network. The cities on the list are; Seattle, Denver, Las Vegas, New Orelans, New York, San Diego, Kansas City and San Jose/Bay Area.
The Galaxy Note II will be the first to adopt the LTE network upon its release, having recently upgraded the software to support it, OpenSignal reports.
OpenSignal's report says, "T-Mobile has ambitious plans to roll out LTE to 100 million people by mid-2013 and 200 million peope by the end of 2014."
The company will continue to track the coverage and produce data based on speeds and devices.
With both Verizon and AT&T supporting widespread 4G connectivity, T-Mobile have to push forward to catch up with their rivals.
More news on the LTE network and other plans from T-Mobile are predicted to be announced at Tuesday's event in New York.
Early this month, mobile network Three UK clarified it will be rolling out 4G mobile broadband across the UK later this year.