This is a guide on how to unroot the Galaxy S4. Both GT-i9500 and GT-i9505 versions are supported. Here are the pre requisites.
1-You should have latest version of Samsung Kies installed.
2-You need to enable USB debugging mode enabled on your phone.
3-Your Galaxy S4 should have more than 70 percent charge.
4-It should be factory unlocked.
Unrooting procedure.
1) Turn OFF your phone and go to Download Mode. Do this by pressing and holding the Volume Down + Home Buttons together for few seconds followed by Power button. Then, press volume up to proceed.
2) Open ODIN on computer and connect the phone to your computer.
3) Once your phone is successfully connected to your PC, the ID:COM box on ODIN will turn blue and will show the COM port number.
4) Download the correct firmware for your phone from the list given below. This will give you home.tar file.
5) Click on pda (in ODIN app) and choose the file downloaded in previous step.
6) Check "Auto Reboot"; "F. Reset Time" options and make sure that "Re-Partition" is unchecked.
7) Click on Start button in ODIN window to start the flashing process. It will take just a couple of minutes. It will restart after success is shown in ODIN.
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