Sony announced the Xperia Z1s at CES earlier this month, and it quickly showed up on T-Mobile's website. So Americans looking to just own the handset have had a week to order one online from the carrier, while those wanting a deeper relationship with the device - to love it for what's on the inside, rather than the outside - have had to wait a little longer. But now their opportunity has come as well.
The new Xperia Z1s on T-Mobile is almost identical to the international Z1, except for the radio bands and some software tweaks. One thing that definitely isn't the same is the bootloader – it appears that T-Mobile has requested Sony not allow bootloader unlocks on this device. For a company trying to upend the traditional carrier model, this is awfully old-fashioned carrier behavior.