Hey CoinsForTech, big fan of this phone. Would be great if you could get some of the other versions up 
Here is the white paper straight from sony: http://dl-developer.sonymobile.com/documentation/whitepapers/Xperia_Z3_D6603_D6633_D6643_D6653_D6616_WP_1.pdf
For T-mobile in the US you'll want 6603.
For AT&T in the US you want either 6603 or 6633.
T-mobile is going to be releasing their own branded version of this phone which will also include band 12 (future lte deployment).
There's no word on AT&T having a version that supports band 30 which is their future deployment band.
The 6653 looks like it is meant for Asian markets I believe.
Here is the white paper straight from sony: http://dl-developer.sonymobile.com/documentation/whitepapers/Xperia_Z3_D6603_D6633_D6643_D6653_D6616_WP_1.pdf
For T-mobile in the US you'll want 6603.
For AT&T in the US you want either 6603 or 6633.
T-mobile is going to be releasing their own branded version of this phone which will also include band 12 (future lte deployment).
There's no word on AT&T having a version that supports band 30 which is their future deployment band.
The 6653 looks like it is meant for Asian markets I believe.
Just confirming that we cannot get any models other than the D6653. Sorry!
