Sony may not have the best track record when it comes to making its phones available across a wide number of carriers in the US, but it has no problem sharing its open source kernel files on a timely basis. The company officially announced the Xperia Z2 a month ago at Mobile World Congress, and now much of the handset's internal code is available for download on the web.
These files also apply for the Xperia Z2 Tablet, which Sony also unveiled at Mobile World Congress. These files don't do much for the average user, but they're essential for ROM developers looking to support Sony's latest Xperia devices. Those tinkerers can download the full 188MB archive at the link below.
Source: Sony Mobile