Sudenly I've found an alternative way of unlocking bootloader. It was found on Russian 4pda forum in XPERIA neo section (here's the link if you can understand Russian). I just googled a bit and here we are

This method keeps DRM keys (not sure about the warranty, so follow these instructions on your own risk). Credits go to the_laser.

All we need is:
  • find short piece of wire & download s1tool software (attached)
  • Locate test point connector and ground battery connector on your sk17 (look at the picture below - thanks ooxtcoo for the picture)
  • instructions from here (post #4; just mention that sk17 is supported now):
    http://support.setool.net/showthread.php?2...equest-for-help

That's all. Now you can flash your own kernels or do anything you want with unlocked bootloader. If your phone won't boot flash it via FlashTool.

Cheers!

P.S. I tried both lock and unlock. Works great.
Attached Files
File Type: rar s1tool.rar - [Click for QR Code] (4.48 MB, 32664 views)