i followed this guide
How to SIM-Unlock for HTC J, ISW13HT | hello.c
d:\srockyou\tools>adb shell
adb server is out of date. killing...
* daemon started successfully *
root@android:/ # dd if=/dev/block/mmcblk0p4 of=/sdcard/mmcblk0p4
dd if=/dev/block/mmcblk0p4 of=/sdcard/mmcblk0p4
2+0 records in
2+0 records out
1024 bytes transferred in 0.007 secs (146285 bytes/sec)
root@android:/ # exit
exit
d:\srockyou\tools>adb pull /sdcard/mmcblk0p4 mmcblk0p4ORIG
0 KB/s (1024 bytes in 5.576s)
d:\srockyou\tools>adb push mmcblk0p4MOD /sdcard/mmcblk0p4MOD
200 KB/s (1024 bytes in 0.005s)
d:\srockyou\tools>adb shell
root@android:/ # dd if=/sdcard/mmcblk0p4MOD of=/dev/block/mmcblk0p4
dd if=/sdcard/mmcblk0p4MOD of=/dev/block/mmcblk0p4
2+0 records in
2+0 records out
1024 bytes transferred in 0.001 secs (1024000 bytes/sec)
root@android:/ # sync
sync
root@android:/ # reboot bootloader
reboot bootloader
d:\srockyou\tools>fastboot getvar cid
cid: KDDI_801