คำอธิบาย Sim Unlocker : Unlock Any Sim Card

Sim Unlocker "Easily create your smartphone / tablet so you can use any other network operator.
No need to unlock the code on most devices: as simple as a button click, and you can change your SIM card from the operator!
SIM Unlock is the only application that can unlock new devices instantly and successfully. Even with the recent update of ICS or JB Roma.
Sim Unlocker Features:
* Unsimlock / unbrand your phone
* Detects errors like lost imei / serial in nv_data caused by third party apps
* Gives detailed information about current locks status (locked, unlocked or "locked")
* Automatic and manual efs backup, restore it on demand
* Persists even after reset / flash / wipe / unroot
* Galaxy family devices (S, S2, Tab, Note and their variants)
* Devices previously unlocked with "voodoo unlock", "GalaxSim Unlock" or "galaxy s unlock"
Easy to use:
• Make sure your ROM is rooted (tutorial links included for major devices) (you can override once unlocked)
• Click on the "unlock" button
• Restart
Remarks:
• If the SIM cards of the other carriers are still refused after a successful unlock, your operator could be "blocked" by your operator.