Tech: SIM unlock Samsung Galaxy S3


How to SIM unlock your Galaxy SIII for free!!



-----I cannot be held responsible for anything that happens to you or your phone, from carrying out anything I have said!-----


Credits: txlibre, mskip, the person whoever originally wrote these instructions
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VIDEO GUIDE:
Part 1 (A-E) - http://youtu.be/P1H2yUyQ4J8
Part 2 (1-25) - http://youtu.be/uAVbYx68WI4

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Things to do before starting:
A - Make sure your S3 is rooted (http://forum.xda-developers.com/show....php?t=1703488).
B - Make a backup copy of the /efs folder on your PC.
C - Also backup your EFS using mskips ToolKit (http://forum.xda-developers.com/show....php?t=1703488).
D - Get a Hex Editor (I used Notepad++ with this plugin: http://sourceforge.net/projects/npp-...l.zip/download (just put the dll in the plugins folder of Notepad++)).
E - Install Root Explorer on your phone.

Now for the actual process:
1 - Using Root Explorer, copy the file nv_data.bin file from your phones /efs folder to your PC and open it in Notepad++.
2 - Scroll down and find address 00181460, modify the 01 to 00.
3 - Save the file.
4 - Copy the modified nv_data.bin from your computer back to your phones /efs folder using Root Explorer.
.....(Make sure you keep a copy of this modified file for step 15.)

5 - Once copied to the phone, open Root Explorer and long press on the nv_data.bin file till the menu pops up and select 'Permissions'.
6 - Make sure ONLY the Read, Write and Execute boxes for Owner are ticked, and press OK.
7 - Then again, long press on the nv_data.bin file till the menu pops up, and select 'Change owner'.
8 - Change Owner and Group to 1001-Radio and press OK.
9 - Restart your phone.
10 - Once restarted dial *#7465625#, check Network Lock is ON and press OK.

11 - Using Root Explorer, copy the file nv.log from your phones /efs folder to your PC and open it.
12 - You should see something like:
... ..Mon Jun 18 23:34:32 2012: MD5 fail. orignal md5 'e1493854d4d62ff4e123040855f8b2a9' computed md5 'd29d791b193de8b6711445231fb7d427' (rild)
.. ...Mon Jun 18 23:34:32 2012: backup NV restored.

... ..(Your numbers may differ).

13 - Copy the file nv_data.bin.md5 from your phones /efs folder to your PC and open it.
... ..You should see the first number listed in step 12 (in my case e1493854d4d62ff4e123040855f8b2a9).
14 - Copy the second number in step 12 (in my case d29d791b193de8b6711445231fb7d427) and put in the nv_data.bin.md5 file, so it is the only number in there. Now save the file.

15 - Now copy the modified nv_data.bin file (from step 4) and the modified nv_data.bin.md5 (from step 14) back to your /efs folder on your phone.
16 - Once copied, long press on the nv_data.bin file till the menu pops up and select 'Permissions'.
17 - Make sure ONLY the Read, Write and Execute boxes for Owner are ticked and press OK.
18 - Then again long press on the nv_data.bin file till the menu pops up and select 'Change owner'.
19 - Change Owner and Group to 1001-Radio and press OK.

20 - Now, long press on the nv_data.bin.md5 file till the menu pops up and select 'Permissions'.
21 - Make sure ONLY the Read, Write and Execute boxes for Owner are ticked and press OK.
22 - Then again long press on the nv_data.bin.md5 file till the menu pops up and select 'Change owner'.
23 - Change Owner and Group to 1001-Radio and press OK.

24 - Restart your phone.
25 - Once restarted dial *#7465625# and check Network Lock is OFF and press OK.

Tnx to vinokirk @ XDAdevelopers

 


                                                                      XDAdevelopers 



UPDATE :

After flashing to I9300XXBLG8 this method does not seem to work anymore and you have to do this:

-Flash via odin lf6
-Root with cf root
-Unlock with voodoo sim unlock
-Install root explorer from market
-Download efs.zip and ktool.apk from gfan
-Back up efs with ktool and save to pc
-Transfer nv_core.bak and nv_core.bak.md5 from efs.zip gfan to internal sdcard
-Enter on system efs...mount ro on root explorer
and replace this tho file and changed permision exactly have been original file(first three boxes tiked)
-Reboot phone
-Done !
Flashed via odin lg8 and my phone it s still unlocked, factory reseted and still unlocked

Attached Files
File Type: zip efs.zip - [Click for download]
File Type: apk ktool-1.56.apk - [Click for download]

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