Hey CrackBerry Nation...Tmo doesn't offer NFC on their 9900 with OS 7.1...I'm not sure why the don't, however is there a work around to have the function?
Patient is the key.
Wait for some time and as NFC becomes more usable like wifi or Bluetooth, they will definitely allow NFC Or the moment they find out to charge users for NFC, whichever comes first.