No need for unlock code on most devices: as simple as one button click, and you can change your carrier sim card !
Sim card Unlock is the only app that can instantly and successfully unlock new devices. Even with recent ICS or JB roms update.
★ Sim Unlock your phone
★ Backup and Restore EFS data, keep it safe on your email or Drive account (free)
★ Get detailed information about your nv/lock state
* Please note that due to different hardware, many LTE/4G devices aren’t supported yet. On some SGS3, SGS4 and Note2,
a recent rom update brings a new lock system that can't be unlocked yet. Don't leave bad feedback, we’re working on it,
but that’s a complex process that requires time and access to locked devices! *
✔ Unsimlock / unbrand your phone
✔ Persists even after reset / flash / wipe / unroot
✔ Supports other Galaxy family devices (S, S2, Tab, Note and their variants)
✔ Supports devices previously unlocked with "voodoo unlock", "GalaxSim Unlock" or "galaxy s unlock"
✔ Detects errors like lost imei / serial in nv_data caused by third party apps
✔ Gives detailed information about current locks status (locked, unlocked or "partially locked")
✔ Automatic and manual efs backup (should guarantee a safe use), restore it on demand
✔ Supports more Galaxy devices soon
Easy to use:
• Be sure your rom is rooted (tutorial links included for major devices)(you can unroot once unlocked)
• Click on "unlock" button
• If other carriers' sim cards are still refused after a successfull unlock, your phone might be "hardlocked" by your carrier.