https://qooah.com/2011/05/30/sony-ericsson-%e8%a7%a3%e4%ba%86-bootloader-%e5%bd%bc%e5%b0%87%e4%b8%8d%e6%9c%83%e5%86%8d%e6%9c%89%e5%ae%98%e6%96%b9%e6%9b%b4%e6%96%b0/