Hello another time.
I dicovered a new method to unlock the Spica for all carriers.
This method can be public, is no related with imei generation, I do it public for all Spica users.
You need be root, root explorer and one hex editor, I use UltraEdit, you can use the trial version.
First step, backup efs folder.
With root explorer, copy the efs folder from your Spica to your sd memory, save two copies in your pc, one is a backup, no modify it, and the other copy is for modify nv_data.bin to unlock the Spica.
Second step, edit nv_data bin and paste in efs folder.
Open nv_data.bin with your hex-editor, I use Ultraedit.
Go to line 433a0h, you only need do changes in this line.
Look at this first image, is your locked sim nv_data.bin:
You need do this changes, is a unlocked sim nv_data.bin:
Edit line 433a0h, do changes in hexadecimal area, not the encrypted area, only two values, change 01 to 00, see the pictures, and save the nv_data.bin modify.
Now the nv_data.bin is sim unlocked.
Put the new nv_data.bin in your sd card.
Copy with root explorer from your sd card, and paste in to efs folder, overwrite the original nv_data.bin.
Reboot and enjoy
PD: Other values, and changes in near lines too are valid, this disable the check sim.
If you like my work, buy me a english dictionary, is very bad Donate