when you plug in usb cable in computer and when computer asks for drivers dont install the PL2003 drivers.Instal the sst usb drivers,you can find them on support site of sst.After that check on which com is cable instaled(Right click on My Computer;Hardware;device manager)and set that com port on sst.After all this done you can unlock phone.
大意是,安装sst提供的驱动(可到网站下载 )然后查看你的USB数据线用的是那个端口(点击我的电脑属性,硬件,点硬件管理器)然后在SST上设置的端口。接着就可解锁