We had already known that T-Mobile was planning to launch their 4G LTE network this month, however it looks like they have quietly flipped the switch in select cities. What we have seen is all unofficial at the moment and is said to have come by way of OpenSignal. For those not familiar with the name, OpenSignal is a Wi-Fi and signal-finder app for Android that uses crowdsourced data.

Perhaps more important here — where is that T-Mobile LTE. Well, so far it has been spotted in eight cities. They include Denver, Las Vegas, Kansas City, New Orleans, New York, San Diego, San Jose, and Seattle. The speeds look to be averaging 25Mbps down and 8Mbps up with a 40ms latency.

Touching on those speeds. While they are both really nice to see, we do have to remember that this is based on testing of a network that is not yet saturated with customers. In other words, they will likely be slower when the network is open and being used by the masses. OpenSignal is also reporting that T-Mobile has been doing testing with the Galaxy Note II as well as the yet-to-be released GALAXY S 4.

Coincidentally, OpenSignal has also made mention of the GALAXY S 4 having a Snapdragon S4 (MSM8960) processor. But nothing all that surprising there as we have heard that in the past. While we wait for the official launch in these cities, the carrier has previously announced plans to have LTE available for 100 million people by mid-2013 and a total of 200 million by years-end 2014.

[via PC Mag]