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):
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.
P.S. I tried both lock and unlock. Works great.