How to Network Unlock Samsung GT I5800l Using Only Your Computer

This article takes you through the steps of rooting and unlocking your Samsung GT-i5800 smart-phone using only your computer along with a few selected programmes. Online unlocking services are usually costly and are, many times, ineffective.  However, by following these instructions, you can unlock your GT-i5800 yourself. Network unlocking your phone allows you to use it on any GSM network.
STEPS

1

VERIFY NETWORK LOCK. On your phone, go to the keypad and type the code #7465625#
Only "Network Lock" should be ON
Proceed if "Network Lock" is ON
ADB stands for Android Debug Bridge. This allows you to send programme commands to your phone, which is connected to your desktop, via USB.
If you do not already have ADB installed, you can install the AndroidControl 1.3.1 package which contains the ADB executable. Your may download it from here.

2

EXTRACT THE FILE TO YOUR DESKTOP OR TO ANY FOLDER YOU CHOOSE.

3

INSTALL HXD HEX OR. HxD is an hex editor that will allow you to make the all important change to one of the files which will be copied from your phone. You may download this win

3

2 executable from: http://download.cnet.com/HxD-Hex-Editor/

3

000-2

3

52-10891068.html?part=dl-HxDHexEdi&subj=uo the "adb.exe" file resides here.
Enter this command at the prompt: "adb devices". Under "List of devices attached" you should get a reply looking like "6442d495f989 device". If nothing is printed, try the command again. If nothing is again printed, check if you are in the correct folder, or if your USB cable is properly connected to the computer, or if the drivers for your phone are properly installed. Continue after the issue is resolved.
Enter this command at the Command Prompt: "adb shell" This opens the adb shell
Enter "su" This grants root privileges
Enter "cat /efs/nv_data.bin >> /sdcard/nv_data.bin" This copies the file we want (nv_data.bin) to the SD card.
Enter twice the command "exit"
Mount your phone's SD Card.
Copy the "nv_data.bin" file from the SD Card to your Computer's Desktop. Place another copy of this file (make a backup) in another folder on your computer.
Run HxD hex editor by clicking on the icon it installed on your desktop.
Drag the "nv_data.bin" file, which is on your desktop, to the HxD editor window.
Select menu: Search > Goto; then, in the dialogue box, type 40a05
Change the value DA to DB
Save the file and copy it from your Desktop back to your SD Card, replacing the one already there.
Unmount the SD Card and do 5e and 5f again.
Enter "rm /efs/nv_data.bin" This removes the nv_data.bin file from your phone.
Enter "rm /efs/nv_data.bin.md5" This removes the nv_data.bin.md5 file from your phone. This file is automatically recreated.
Enter "cat /sdcard/nv_data.bin >> /efs/nv_data.bin" This copies the adjusted nv_data.bin from your SD Card back to your phone.
Enter "chmod 755 /efs/nv_data.bin" This changes the file permission.
Enter "chown radio.radio /efs/nv_data.bin || chown 1001.1001 /efs/nv_data.bin" Changes file root owner to radio group radio.
Do 5h again
Unplug USB cable and restart your phone

8

YOU NOW HAVE AN UNLOCKED SAMSUNG GALAXY GT-I5

8

00L.

9

ON YOUR PHONE, GO TO THE KEYPAD AND TYPE THE CODE #7465625#
"NETWORK LOCK" SHOULD NOW BE OFF
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WARNINGS
The instructions contained herein can be carried out using Linux.  However, try using windows instead, since some of the other programmes referenced in this procedure are win32 executables.
SOURCES AND CITATIONS
http://www.neumrli.com/blog/2013/03/09/network-unlock-samsung-galaxy-i5800-samsung-galaxy-3/
ARTICLE INFO
Categories: Cell Phone Maintenance
Recent edits by: Adelaide, Savannah, Teresa
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