I have pre-ordered a lot of phones from T-mo and I have to say this one has been different than all the others.
In the past when you got the tracking number you got your phone within 24 hours.
There are 2 possibilities here I think....
T-mo DOES NOT have stock yet and all they did was create shipping labels (which generated the automated shipping texts we all got)
or
T-mo is holding them all up waiting until it gets closer to release date.
I am betting T-mo is holding them up to ship out closer to release date