Everything seems to be exactly the same without WI-FI availability on T-Mobiles network? Im ok, with this but would like to figure out if I can install it somehow through a patch or software upgrade of sorts?

What is a non-RIM BlackBerry 8900?

maybe they think because its from t-mob its not a RIM device?
the 8900 has wi-fi.
if you dont have wi-fi its not a 8900

Wirelessly posted (9530; (I'm mobile) MF231; 35h)

There are no "non-RIM" BlackBerrys.
It wouldn't be a BlackBerry

Maybe it's one of the Chinese "blueberry" knock-offs?

quad band blueberry l900i phone