Just plugged into itunes and it installed carrier update. Stepped outside (out of wifi) and notices it's 4g enabled now as well. I will only get LTE when in certain areas here in Atlanta I'm sure but LTE is enabled here. Up until now the only network I would get is 3g and Edge.
My guess is the carrier settings update is or will be for all iPhones on Tmobile to enable carrier support for Visual Voice Mail, and text/picture messaging support as well.
True. Mainly to add the ability to utilize LTE for unlocked phones on their network, which is what I have. I already had text/pic messaging capabilities.