Firmware Android

Samsung has pushed the official Android 4.4.2 KitKat to Samsung galaxy S4 a few days ago, after walking around this update, I have found that there is a problem while trying to change the CSC (product) code.
If you tried to change CSC by using cscselector app or terminal, you will not see any changes and the CSC will stuck in the default code.

I will show you how to change it easily

Requirements :

• Rooted galaxy S4 or any galaxy device.
• Installed root file explorer ES File Explorer or Root Explorer.
• Installed CSCSelector or Terminal app

In my case, I will change CSC code from DBT to BTU.

Instructions :

• Open ES File Explorer or Root Explorer and mount RW.
• Navigate to : System / csc / BTU / system / csc /
• Copy all the files on csc folder and go back to paste it in : System / csc /
• Accept Overwriting or replacing files.
• Use CSC selector app or Terminal method to change CSC to BTU.

Done !!!

Notes :

• WARNING : Changing CSC will delete all data on your device.
• This method will work only on ROOTED devices
• This will only work if your current firmware support Multi-CSC
• It might display "PreconfigUI does not support SingleCSC" if your current firmware doesn't support Multi-CSC.
• This method should work for many galaxy devices which running Android jelly bean and KitKat. 

Links :

• Android Terminal Emulator App HERE
• CSC Selector App  HERE
• ES File Explorer App HERE
• Root Explorer App HERE
• Region CSC code list HERE

This guide for all Samsung galaxy S6 and S6 edge variant (International, AT&T, Verizon, T-Mobile, Sprint, Canadian, etc)

Rooting your Nexus 5 phone by CF-Auto-Root method is the quickest and easiest way for gaining full root permissions on the device.
CF-Auto-Root does not include a custom kernel, it will keep your nexus 5 as close to stock as possible with root access.

Requirements :

• Google nexus 5
• Extracted CF-Auto-Root file.
• Installed Google USB driver.
• Windows PC.

Steps :

• Backup all data before starting rooting process, it will wipe all your data.
• Turn off your nexus 5 and put it into fastboot mode (power + vol down) buttons.
• Double click "root-windows.bat" for windows and press any key on your computer's keyboard to continue.
  
• Connect your device to PC via USB cable (wait until your PC detect it).
• Press vol up to choose "unlock bootloader", then power button to confirm.
  
• Your nexus 5 will erase the data, then reboot into a screen which display a red Android logo.
• Wait a few minutes until your device finish configuration.
• You will see SuperSU app in your device app drawer

Done !
Notes :

• This process will void your device's warranty
• CF-Auto-Root method will unlock bootloader, install SuperSU and binary, NO custom recovery.
• Use it at your own risk
• Credit goes to "chainfire" cf-auto-root developer, main thread.

How to install USB driver for Nexus phones ...

- Download and unzip the downloaded driver file "latest_usb_driver_windows.zip".

- Connect your nexus to PC

- Right click on my computer and choose "Manage"

- Click on "Device Manager" and you should see your device name, right click on it and choose "Update Driver Software..."

- Browse your computer for the extracted folder "usb_driver".

Downloads :

• CF-Auto-Root file for Nexus 5 HERE 
• Google USB driver HERE

This tutorial will learn you how to fix "not registered on network", wrong IMEI for :

• Samsung galaxy S3 GT-I9300 model ONLY.
• Samsung galaxy Note 2 GT-N7100 model ONLY. 
• Samsung galaxy S4 GT-I9500 model ONLY.
• Samsung galaxy S4 GT-I9505 model ONLY.

• Backup your important data first just in case of this process corrupt your data.
• Download and install Samsung mobile driver (Skip this if you already have Samsung Kies)  (Link below)
• Download MODEM.tar.md5 file then unzip it only one time (Link below)
• Download Odin3 then unzip it (Link below)Disable the antivirus software, Close Samsung Kies and disconnect any device connected to USB ports on your computer.

Flashing instructions :
1- Run "Odin3" as administrator, Click on PDA button and navigate to Modem.tar.md5 file that you extracted.
2 - Shut down your device and make sure your device is completely off
3 - Put your device into download mode by pressing and holding (Volume Down + Home + Power) buttons
4 - Press Volume up to continue
5 - Connect the device to your computer by USB cable and wait until you get a sign in Odin (ID:COM section) and "Added" in message box.
6 - Make sure re-partition is NOT SELECTED [Very important]
7- Click Start and wait a few seconds until you see "PASS!".

Downloads :

• Odin3_v3.04 HERE, v3.07 HERE, v3.09 HERE
• Samsung Mobile Driver HERE
• Latest Samsung Kies HERE
• Modem_I9300 MG4 - NF1 - NI1
• Modem_N7100 MG1 - ND1
• Modem_I9500 MG9
• Modem_I9505 NC4 - NH8

Complete tutorial about flashing and restoring any model of Samsung galaxy S5 or any Samsung galaxy device to stock firmware.
This guide will make you able to upgrade or downgrade (Limited) your galaxy S5 to any firmware version by using Odin3.

Requirements :

• Stock ROM for the model number of your device
• Odin3 tool.
• Samsung Kies or Samsung mobile driver.
• Charged rooted or non rooted Samsung galaxy S5.
• USB cable and Windows PC

Before starting :

• Backup your important data before flashing, in case of this process corrupt your data. [important in downgrading]
• Download stock ROM file (make sure you download the right FW for your phone's model number) from SamMobile or Samsung-Updates and unzip it only one time (the extracted firmware file has *.tar.md5 extension).
• Download and install Samsung Kies or Samsung mobile driver (Link below)
• Download Odin3 tool and unzip it (Link below)
• Close Samsung Kies and disconnect any device connected to USB ports of your computer.

Flashing instructions :

1. Run "Odin3" as administrator.
2. Click on PDA button (AP if you are using Odin3 v3.09) and navigate to the *.tar or *.tar.md5 firmware file (it will take a few second to check firmware file, if you are using Odin3 v3.09).
   - If the Zip file contains more than one *.tar file then they will be labeled with PDA, Phone and CSC. Put them in the corresponding section of Odin3 
   
3. Shut down your device and make sure it's completely off.
4. Put your device into download mode by pressing and holding (Volume Down + Home + Power) buttons then Press Volume up to continue.
5. Connect your galaxy S5 to PC using USB cable and wait until you get a sign in Odin (ID:COM section) and "Added" in message box.
6. Make sure re-partition is NOT MARKED[very important]
   
7. Click Start and wait a few minutes until you see "RESET" or "PASS!".
   
8. If your device stuck in bootloop, factory reset it from recovery mode.

Done!
Notes :

• Do not disconnect the USB cable or turn your device off while flashing process.
• Install Samsung Mobile Driver or Samsung Kies if you don't see a sign in Odin (Step 6).
• I am not responsible if something wrong happened to your device (use this AT YOUR OWN RISK).
• This process won't take more than 10 minutes.
• Flashing firmwares which contains more than one *.tar.md5 file will wipe all data on internal storage.
• Flashing official/stock firmware won't increase the binary flash nor KNOX WARRANTY VOID counter and won't cancel the device's warranty.  

Downloads :

• Odin3 v3.04 HERE, v3.07 HERE, v3.09 HERE
• Latest Samsung Mobile Driver HERE
• Latest Samsung Kies HERE
• Latest Samsung Kies 3 HERE

"Factory Mode" is enabled if the EFS partition of your device is corrupted.
Sometimes if you succeeded in fixing the EFS partition, you stuck in factorymode.
If you see a annoying transparency black box which contains some info about your device (PDA, CSC, H/W, TSP, TSK ...) in yellow characters ... mean you are in factory mode.

Your device must be rooted to exit this mode.

Steps :
1. Download "ES File Explorer" or "Root Explorer" app
2. Open " Root Explorer" and navigate to : efs/FactoryApp/
3. Open "factorymode" file with text editor
4. Change it from
to
5. Save and exit then Reboot your device
If it doesn't work, do the same steps for "keystr" file
You can also exit this mode by using another method

Steps :
1. Download "Terminal Emulator" app
2. Open "Terminal Emulator" and type
Then enter
3. Type
Then enter ... your device will reboot

Downloads :
"ES File Explorer" app HERE
"Root Explorer" app HERE
"Terminal Emulator" app HERE

After updating Samsung galaxy S3/S4/Note 2/ Note 3 to Android 4.3 jelly bean update which contains the new security from Samsung "Samaung KNOX", you might face a problem if you tried to root your device by using CF-Auto-Root method or other methods.

This might happened because of KNOX security, it block/disable SuperSu app and you will see this notification after the first boot.

"Unfortunately, SuperSU has stopped" 

"Unauthorized access to a secured area has been blocked"

In some cases you will not see SuperSU after rooting in your application list
You can enable it by going to Settings / More / Application manager, Swipe to DISABLED tab and Enable SuperSU app.

How to fix KNOX problem :
1. Go to Google Play, Search and update/install SuperSU app
2. When you will open SuperSU for the first time it will ask you to update the SU binary
3. Tap on "Continue" then "Normal" not the "CWM/TRP".
4. SuperSU will detect Samsung KNOX security and will ask you to disable KNOX, Choose "OK"
5. After displaying "installation success!", reboot your device.
Done !
Now SuperSU and root access should be working fine for you.

How to fix "Unfortunately, SuperSU has stopped"

John Giosso

Download and install the latest APK for SuperSU like MrW0lf suggested.

I was having the same exact problem (unfortunately, SuperSU has stopped), so I downloaded the latest UPDATE-SuperSU file and extract it to have supersu APK, put it on my SD card in my phone and installed it from there.

It was strange because the version that was already on my phone was the same 1.89 version that I downloaded, but regardless, when I clicked on the APK, it saw it as an update, it asked to disabled knox, and worked like a charm.

SuperSU Google Play
SuperSU Pro Google Play

Nexus 5 recovery flasher tool is a simple tool which can install the most familiar custom (CWM, TWRP, PhilZ) and stock recovery image for Google Nexus 5 phone easily using fastboot mode.

Requirements :

• Recovery flasher tool.
• Unlocked Nexus 5 bootloader.
• Installed Google USB driver.
• Windows PC. 

Steps : 

• Turn off your Nexus 5 and put it into fastboot mode (power + vol down) buttons. 
• Extract the tool, Open extracted  folder and double click "Nexus5_Recovery_Flasher.bat"
  
• Type the number of your choice from the list and press Enter key on your computer's keyboard to continue.
• Connect your device to PC via USB cable (wait until your PC detect it).
• Follow the on screen instructions ... 

Done !
Notes :

• This process won't wipe your data.
• Your Nexus 5 phone must have unlocked bootloader.
• Use this tool at your own risk.
• Credit goes recovery developers CWM, TWRP, PhilZ and Goolge.

How to install USB driver for Nexus phones ...

- Download and unzip the downloaded driver file "latest_usb_driver_windows.zip".

- Connect your nexus to PC 

- Right click on my computer and choose "Manage"

- Click on "Device Manager" and you should see your device name, right click on it and choose "Update Driver Software..."

- Browse your computer for the extracted folder "usb_driver". 

Downloads :

• Recovery flasher tool HERE, v1.01
• Google USB driver HERE
  

Notes :
~ This process will not help if you didn't have a backup
~ The backup will be saved in the internal storage as "efs.img" and "efs.tar.gz"
~ KTool work only on Samsung galaxy S2/Note/Nexus/S3 (International I9300 - *NOT* US variants)
~ NEVER RESTORE IF YOU ALREADY DIDN'T LOST THE IMEI
~ I am not responsible if something bad happened to your device (use this AT YOUR OWN RISK)

Downloads :
KTool app http://goo.gl/gcu66

If you was one of those who root their devices by using VRoot method and would like to remove Chinese superuser and related files, you can replace Chinese superuser with the well known SuperSU.
I have made a small script to completely remove Chinese superuser, all related files and folders, install SuperSU and disable annoying KNOX  notification.
This script will do all the work for you without using PC, just by terminal.
First of all, thanks to chainfire for his SuperSU files.

Before starting :

• Root your device by using VRoot method
• Download and install Terminal emulator app
• Download and unzip "Replace_VRoot_With_SuperSU.zip" file

Steps :

• Send the extracted folder "mrw" to the internal storage of your device and make sure that this folder contains 5 files
• Open Terminal emulator and type :

• Allow root permission
• Type :

• Don't be worry if it display more FC, after that your device will reboot

Done !
Notes :

• The extracted folder must be in /Phone/ or you will need to change cmd.
• It won't delete your apps or files, but I recommend to backup your important data first, just in case of this process corrupt your data.
• I have tested it on my galaxy S4 GT-I9505, it must work for galaxy note3 and all devices.
• Use it at your own risk.
• You might need to update SuperSu after rebooting your device. 
• Please let me know the model of your device, if it worked for you
• 28-Jun-14 : upload new version to fix issue for non Samsung devices and delete more VRoot folders and files.
• 29-Jan-15 : new version thanks to @hunktb.

Download :

• Terminal emulator app LINK
• Replace_VRoot_With_SuperSU_V1.zip file LINK
• Replace_VRoot_With_SuperSU_V2.zip file LINK
• Replace_vRoot_with_SuperSU_v2.1.zip thanks @hunktb LINK

TowelRoot is the best app to root more Samsung Galaxy devices whice are running on Android 4.4.2 KitKat but after upgrading to NF update TowelRoot will not root your phone anymore because Samsung has been patched the kernel in the latest update.
By using this guide I will help you to root the Galaxy S4, Galaxy S5 or Galaxy Note 3 on NF update or later on 4.4.2 KitKat.

Requirements :

• Charged Samsung galaxy S4, galaxy S5, galaxy Note 3 running on NF update or later.
• Kernel files
• Odin3 (any version).
• Installed Samsung Kies or Samsung mobile USB driver.
• TowelRoot Apk by Geohot
• Read notes before starting please.

Instructions :

1. This process WON'T wipe your data, but backup your phone just in case this process corrupt your data.
2. Download then unzip your phone kernel files.
3. Flash Model_ROOT_Kernel.tar.md5 file using odin3 in PDA or AP section.
4. Make sure Re-Partition is NOT selected.
   
   After your device boot up 
5. Root your device using TowelRoot method by following this guide : [1-Click Root] Galaxy S4/S5/Note 3 Using TowelRoot Method
6. Make sure your phone is rooted ...
7. Flash back the specific kernel for your phone build number using Odin3 in PDA or AP section.
   

Notes:

• Use this guide at your own risk.
• Please make sure you download the specific kernel files for your phone model number.
• If your device stuck in bootloop after flashing the ROOT kernel, wipe cache/dalvik from recovery mode will fix it.
• This will not trip binary or KNOX counter, but it might change system status to custom.
• To unroot your device --> Open SuperSU app / Settings / Full UnRoot then flash stock FW
• The following models are the only supported devices till now.
• After flashing ROOT kennel, you might face more force close (its normal), so that its better to disable S Health before flashing ROOT kernel (you can enable it after flashing your system kernel)
• WiFi will not work also after flashing ROOT kernel, but you can fix it after rooting by flashing your system kernel.
• For #SprintGalaxyS4 #L720, #TMobileGalaxyS4 #M919, #Verizon_Galaxy_S4_Mini #I435 use the following steps :
  - Open #TowelRoot_v3 and tap 3 times on "welcome to towelroot v3" a new field will appear
  - Change the value from : 1337 0 1 0 4 0
  to : 1337 0 1 7380 4 0
  - Now click "make it ra1n"

Downloads :

• Odin3 v3.04 HERE, v3.07 HERE, v3.09 HERE
• Latest Samsung Mobile Driver HERE
• Latest Samsung Kies HERE
• Latest Samsung Kies 3 HERE
• TowelRoot Apk HERE V2 HERE offline V3 HERE.

- Samsung Galaxy S3

Model Number	Download Link
SGH-I747M    Canadian	[ROOT] - NF2 - NH2 - OB1
SPH-L710       US (Sprint)	[ROOT] - NJ2
SGH-T999V    Canadian	[ROOT] - NH2

- Samsung Galaxy S4

Model Number	Download Link
GT-I9505       International (LTE)	[ROOT] - NF1 - NG2 - NG8 - NH6 - NH7 - NH8 - NJ1 - NI2 - NJ3 - NJ5 - NJ8 - NK2 - NK4 - NL1
SCH-I545      US (Verizon)	[ROOT] - NG6 - NK1
SCH-I545L	[ROOT] - NK1
SCH-R970     US (US Cellular)	[ROOT] - NF6 - NK1
SCH-R970X  US (C-Spire)	[ROOT] - NK1
SGH-I337      US (AT&T)	[ROOT] - NI1 - NJ4
SGH-I337M   Canadian	[ROOT] - NI2 - NJ1- NK1 - OA1
SGH-M919    US (T-Mobile)	[ROOT] - NH7 - NK2
SGH-M919V	[ROOT] - NH3 - NJ1
SPH-L720      US (Sprint)	[ROOT] - NG2
SPH-L720T    US (Sprint)	[ROOT] - NG5 - OA3
GT-I9195       International (LTE) Mini	[ROOT] - NF7 - NH5 - NK1
SCH-I435      US (Verizon) Mini	[ROOT] - NK1 - OC1
SPH-L520     US (Sprint) Mini	[ROOT] - NJ1
SGH-I537      US (AT&T) Active	[ROOT] - NH3
GT-I9295       Active	[ROOT] - NH2 - NI1 - NK4
GT-I9515       Value Edition	[ROOT] - NG1 - NI2 - NI3 - NJ2 - NK2
GT-I9515L     Latin Value Edition	[ROOT] - NK1 - NJ1

- Samsung Galaxy S5

Model Number	Download Link
SM-G900A     US (AT&T)	[ROOT] - NG3 - OA1
SM-G900F     International (LTE)	[ROOT] - NF6 - NG2 - NG4 - NG7 - NG9 - NH6 - NI2 - NI3 - NI4 - NJ1 - NK7 - NL1
SM-G900I      Australian	[ROOT] - NG3 - NI2 - NI3 - NK1
SM-G900K    Korean	[ROOT] - NH3 - NI2
SM-G900L     Korean	[ROOT] - NG1 - NH3 - NI1
SM-G900M    South America	[ROOT] - NG5 - NH2 - NI1 - NJ2
SM-G900P     US (Sprint)	[ROOT] - NI3 - NK4
SM-G900R4   US (US Cellular)	[ROOT] - NG3 - NK1
SM-G900T     US (T-Mobile)	[ROOT] - NF6 - NG3 - NG4 - NH5 - NK2
SM-G900V     US (Verizon)	[ROOT] - NE9 - NHA - NI2 - NK2 - NK7
SM-G870A     US (AT&T) Active	[ROOT] - NG3 - OA1
SM-G900W8  Canadian	[ROOT] - NF3 - NF4 - NH3 - NJ1

- Samsung Galaxy Note 3

Model Number	Download Link
SM-N9005     International (LTE)	[ROOT] - NF4 - NG1 - NG2 - NH1 - NI4 - NJ1 - NJ2 - ZTUFNJ1 - NK1
SM-N9005D  Chinese	[ROOT] - NG2
SM-N900P     US (Sprint)	[ROOT] - NH7         [NOT TESTED]
SM-N900T     US (T-Mobile)	[ROOT] - NF1 - NF4 - NK3
SM-N900W8 Canadian	[ROOT] - NI1 - NJ1

- Other devices

Model Number	Download Link
SM-T530        Tab 4 10.1" (WiFi)	[ROOT] - NH7 - OA1 - OD8
SM-T530NU  Tab 4 10.1" (WiFi)	[ROOT] - NK1 - NK3 - OA2
SM-P600        Note 10.1" 2014 (WiFi)	[ROOT] - NH3

Sep 14 : Added new models G900I, G900L, I747M, I9195 G870A.
Oct 14 : Added new models I337M, I537 and I545 
         Added (NG7, NI4kernel for G900F), (NH7 and NI2 kernel for I9505), (NG5 kernel for G900M)
         and (NH1 kernel for N9005)
Nov 14 : Added new models N900W8, M919V, N900A and N900V
         Added (NI3, NJ1, NF6 kernel for G900F), (NH6, NJ1, NJ3, NJ8 kernel for I9505),
         (NI4, NJ1, NJ2for N9005), (NI1, NJ2 for G900M), (NJ1 kernel for N900W8),
         (NJ1 kernel for G900W8), (NI2 kernel for G900I), (NJ4 4.4.4 kernel for I337),
              (NK3 kernel for N900T)
Dec 14 : Added new models G900P, G900K,I9515, I9515L, I9295 andI435.
         Added (NK2, NK4, NL1 kernel for I9505), (NL1 kernel for G900F), (NK1 kernel for R970)
         (NK1 kernel for I545), (NK1 kernel for I337M), (NK2 kernel for M919), (NK1 kernel for                G900R4), (NK2 kernel for G900T), (NJ2 kernel for I9515), (NK2 4.4.4 kernel for G900V),
         (NK1 kernel for I9195), (ZTUFNJ1 kernel for N9005)
Jan 15 : Added new model N900R4 Galaxy Note3 US Cellular
         Added (NK7 kernel for G900F)04 Feb : Added NK7 kernel for G900V, OA1 kernel for G900A
05 Feb : Added new model T530 Galaxy Tab 4 10.1"
07 Feb : Added NJ5 kernel for I9505
08 Feb : Added NK1 kernel for N9005
10 Feb : Added new model L710 Sprint galaxy S3 
         Added NJ1 kernel for I337M, OA1 kernel for G870A         Added new model T530NU Galaxy Tab 4 10.1"14 Feb : Added OA1 kernel for I337M
         Added new model T999V Galaxy S3
         Added new model I545L Galaxy S4

         Added new model R970X C-Spire Galaxy S4

09 Mar : Added new model SPH-L520 Sprint galaxy S4 Mini
13 Mar : Added OB1 kernel for I747M
19 Mar : Added new model SM-P600 galaxy Note 10.1 Wi-Fi 2014 Edition
22 Apr : Added OA3 kernel for L720T
26 Apr : Added NK3 kernel for T530NU
16 MAy : Added OA1 and OD8 kernel for T530
26 Jun : Added NK1 kernel for I9515 

I have found a way to make "SafeRoot" root the galaxy S3 GT-I9300 on the latest android 4.3 jelly bean like any other devices.

Requirements :

• I9300_Root_Kernel file
• I9300_MK6_Kernel file
• Odin3
• Installed Samsung Kies or Samsung mobile USB driver
• Saferoot file

Instructions :

1. All the process WON'T wipe your data, but back it up just incase this process corrupt your data.
2. Flash Root_Kernel.tar.md5 file by odin3 in PDA or AP section.
3. Make sure Re-Partition is NOT selected.
   
4. Root your device using SafeRoot method by following this guide : [No Warranty Void] Safe Root Android 4.3 for Galaxy S3/S4 Note 2
5. Flash back the current kernel of your firmware MK6 until Samsung update it by Odin3

Notes:

• Download and install manually busybox if the tool is failed to install it.
• Use this guide at your own risk
• This process and kernel files ONLY for the international version GT-I9300 and ONLY for Android 4.3 jelly bean.
• Normally this process will continue to work until Samsung starts to push Android 4.4 kitkat to the S3 (DON'T use it on 4.4 kitkat, it will brick your device).
• You will not be able to receive OTA update, but you can update your device at any time by Kies or Odin3. 
• This process is tested by me and worked on all the latest Android 4.3 jelly bean firmwares.
• To unroot your device --> Open SuperSU app / Settings / Full UnRoot.

Downloads :

• Odin3 v3.04 HERE, v3.07 HERE, v3.09 HERE
• Latest Samsung Mobile Driver HERE
• Latest Samsung Kies HERE
• Latest Samsung Kies 3 HERE
• I9300_Root_Kernel HERE
• I9300_MK6_Kernel  HERE 
• I9300_NB1_Kernel HERE thanks to "afham"
• SafeRoot files HERE 

This rooting method is working for a wide range of Android device (not only Samsung), it can also root devices which are running Android 4.2

• Samsung galaxy device or other
• USB cable
• Windows or Mac PC
• Rooting tool

• Download and install USB driver of your device
• Download and unzip Saferoot tool
• Put your device in "USB debugging" mode (Settings > Developer options)
• Backup your data just in case of this process corrupt your data

• Open "run.bat" or "install.bat"
• Connect your device to PC via USB cable
• Accept when your device display "Allow USB debugging" message
• Follow the instructions 
• After finishing root process, go to play store and update SuperSU

YT video link : https://www.youtube.com/watch?v=GiZ7D2zjJdANotes :

• This tool can root more android devices and it is harmless if it fails to root your device.
• This process won't delete any data, but backup your important data just in case this process corrupt your files.
• Rooting by using this method will not change the binary or KNOX counter. 
• The status of the system will be changed to custom.
• If you would like to restore system status to official, flash stock Rom.
• I am not responsible for any damage to your device (use this AT YOUR OWN RISK).
• Credit goes to "k1mu" who modify root exploit to work on 4.3 with SELinux enforcing
• Xda thread

Tested and worked for :
- SCH-I545 Verizon Galaxy S4  ME7,MJ7,MK2
- SGH-I337 ATT Galaxy S4  MK2, MK6
- SGH-I337M Canadian Galaxy S4
- SGH-M919 T-Mobile Galaxy S4  MK2
- GT-I9505 LTE Galaxy S4  MH6, MKE, MKF, MJ5
- GT-I9500 3G Galaxy S4  MK1
- SPH-L720 Sprint Galaxy S4
- SCH-I435 Verizon Galaxy S4 Mini  MK5
- GT-I9192 Galaxy S4 Mini  MK4
- SPH-L520 Sprint Galaxy S4 Mini
- SCH-I535 Verizon Galaxy S3 - MK2, MJ3
- SGH-I747 AT&T Galaxy S3
- SGH-1747M Canadian/Bell Galaxy S3
- SGT-T999 AT&T Galaxy S3
- SGH-T999L T-Mobile Galaxy S3 4.3
- SGH-T999V Wind Galaxy S3 4.3
- GT-I9300 Galaxy S3  4.2 & 4.3
- SPH-L710 Sprint Galaxy S3
- SCH-R530C Cricket Galaxy S3
- SCH-R530U US Cellular Galaxy S3
- SCH-R530X Alltell Galaxy S3  MK4
- SCH-L710 CSpire Galaxy S3
- SCH-I605 Verizon Galaxy Note 2  4.3
- GT-N7100 Galaxy Note 2 MKA
- SGH-I317M Telus Galaxy Note 2
- GT-P5513 Galaxy Tab 2
- Razr HD 9.30.1
- Razr M 98.18.94,98.30.1
- Kindle Fire HD
- Verizon HTC One
- .....

Downloads :

• Latest Samsung Mobile Driver HERE
• Latest Samsung Kies HERE
• Latest Samsung Kies 3 HERE
• Saferoot.zip on xda thread or my rewritten script HERE 

IMEI is a unique identification number programmed onto your device and you can check the unique IMEI of your device by dialing *#06# or written on sticker under the battery. It is required in order to be correctly identified on a mobile network.
Without IMEI, you cannot make calls, send SMS or use mobile data.

EFS is a partition on the internal memory of your device which contain important data including the IMEI.
If the data in this partition gets corrupt, you will lose your IMEI

Requirements :
1. Samsung galaxy S4 device
2. "Android Terminal Emulator" app (Link below)

EFS Backing up Steps :
1. Open "Android Terminal Emulator" and type
Then enter
It will ask for root permission
Then enter
B.  For galaxy S4 all LTE and US variant Type :
Then enter

C.  For galaxy S3 all LTE and US variant Type :

dd if=/dev/block/mmcblk0p11 of=/sdcard/efs.img

dd if=/dev/block/mmcblk0p12 of=/sdcard/mod1.bin

dd if=/dev/block/mmcblk0p13 of=/sdcard/mod2.bin

Then enter

3. Backup the created files on your phone's internal storage to your PC or the cloud.

EFS Restoring Steps :
1. Send the files (Step 3) to the internal storage of your device
2. Open "Android Terminal Emulator" and type :
Then enter
It will ask for root permission
3.A. For galaxy S4 GT-I9500 Type :
Then enter
B. For galaxy S4 all LTE and US variant Type :
Then enter

C. For galaxy S3 all LTE and US variant Type :

dd if=/sdcard/efs.img of=/dev/block/mmcblk0p11

dd if=/sdcard/mod1.bin of=/dev/block/mmcblk0p12

dd if=/sdcard/mod2.bin of=/dev/block/mmcblk0p13 

Then enter

4. Restart your device
Done !
Notes :
~ It won't delete your data
~ Make sure you choose the correct cmd in restoring process
~ This method will work only on ROOTED devices
~ Backing up EFS partition is highly recommended for users who use the custom Roms
~ Use it at your own risk
~ This method won't repair your device if you don't have a backup of the EFS partition, but you can to try this How to Fix "Not Registered on Network"/Wrong IMEI for Galaxy S3/S4/Note2
~ Every device has unique partition, so you can't use this if you have backup file from another device

Downloads :
Android Terminal Emulator App HERE 

Custom recovery will allow you to perform some powerful actions, like full backup / restore, flash custom ROMS, Mods, themes, apps, install updates to Android operating system manually and many other features.

Flashing/installation instructions :
 It won't wipe any data but it's recommended to backup your important data first just in case of this process corrupt your data 
1- Download the correct recovery file for your device (Link below) or any recovery you prefer
2- Download and install Samsung mobile driver (Link below)
3- Unzip the downloaded file only one time
4- Run "Odin3" as administrator
5- Click on PDA button and browse to the unzipped file.tar that you extracted
6 - Disconnect any device connected to USB ports on your computer, disable your antivirus software and exit Samsung Kies
7 - Shut down your device
8 - Put your device into Download Mode (Volume Down + Home + Power)
9 - Volume up to continue
10 - Connect the device to your computer by USB cable and wait until you get a sign in Odin (ID:COM section) and "Added" in message box
11 - Make sure re-partition is NOT SELECTED [Very important]
Done !
Notes :

• I am not responsible if something happened to your device (use this AT YOUR OWN RISK)
• Skip step 2 if you already have Samsung Kies or Samsung mobile driver on your PC
• This stuff is made for Samsung galaxy S4 devices (AT&T, Cricket, GT-I9500, Canada/Bell, Sprint, T-Mobile, US Cellular, Verizon and GT-I9505)
• Some devices have a locked bootloader, unlock it first before flashing the recovery file
• I just converted "*.img" files from clockworkmod website to "*.tar" file which you can flash by Odin3
• (You can convert it by following this easy TUT : How to Convert *.img to *.tar.md5 )
• Official CMW website www.clockworkmod.com
• Download and Install Kies or Samsung mobile driver, if you didn't get a sign in ID:COM or "Added" in message box

Downloads :

• Odin3_v3.04 HERE, v3.07 HERE, v3.09 HERE 
• Latest Samsung Mobile Driver Here
• Latest Samsung Kies Here

Touch CWM

• Samsung Galaxy S4 (AT&T)                 Ver 6.0.3.2 / Ver 6.0.4.4
• Samsung Galaxy S4 (Cricket)               Ver 6.0.3.2 / Ver 6.0.4.4
• Samsung Galaxy S4 (Canada/Bell)      Ver 6.0.3.2/ Ver 6.0.4.4
• Samsung Galaxy S4 (Sprint)                Ver 6.0.3.2/ Ver 6.0.4.4
• Samsung Galaxy S4 (T-Mobile)           Ver 6.0.3.2/ Ver 6.0.4.4
• Samsung Galaxy S4 (US Cellular)        Ver 6.0.3.2/ Ver 6.0.4.4
• Samsung Galaxy S4 (Verizon)             Ver 6.0.3.2/ Ver 6.0.4.4
• Samsung Galaxy S4 LTE (GT-I9505)    Ver 6.0.3.3/ Ver 6.0.4.4
• Samsung Galaxy S4 (GT-I9500)           Ver 6.0.3.2 
• Samsung Galaxy S4 (C Spire)                                   Ver 6.0.4.4