Just as an FYI. The T-Mobile branded Galaxy Tab 2 10.1 has been updated to enable LTE. The update is available via Kies or OTA. I did mine OTA, but have yet to go to an LTE area to give it a test.
I have had it since the day it OTA'ed to my Tab and the 4 G icon is gone but there is not a LTE icon in replacement. Speedtest out of Reston VA gave me a 15606 kbps download and 10120 kbps upload 29ms on the ping. That's a lil better than the DC read and loads better than the 4G read.