As for when T-Mobile will carry the Z30, T-Mobile Germany carries the Z30 as of now. When and if T-Mobile U.S.A. decides to carry this model in America is anyone's guess. You call T-Mobile Support North America and they have no clue what's going on more than generally and contradict my statement that Z30 is being offered by T-Mobile Germany. See for yourself:
The BlackBerry Z30 launches on T-Mobile Germany | CrackBerry.com
So, yes....T-Mobile North America Customer Service...T-Mobile Germany DOES CARRY THE PHONE.
As to when we will get pushed the 10.2 O.S. update for our Z10s? Well, pushing updates has never been a priority, particularly for little old Blackberry products, has it? The release was submitted to all carriers some time ago beginning in the middle of October 2013. At least the Z30 will come with O.S. 10.2 pre-installed when and if they decide to offer them for sale here in the United States.