1. You have to install Samsung USB driver’s on your computer, so that you can connect your Galaxy S4 smartphone with it.
2. Battery level of your device should be above 70%. If for any reason your device gets switched off in the middle of the flashing process, then it will get bricked. So avoid it by having a good battery backup.
3. During the installation of stock ROM on you Galaxy S4, all the persona data in your device will get loss. So backup the data by either taking a Nandroid backup or by usingSamsung Kies.
4. Next, enable USB debugging mode in your device. You can do it by following this guide.

Files Required:

• Download Odin

Stock ROM For U.S.A Galaxy S4:

1. Download T-Mobile Galaxy S4 Stock Firmware (4.4.2_M919UVUFNB4)
2. Download T-Mobile Galaxy S4 Stock Firmware (4.4.2_M919UVUAMDL)
3. Download AT&T Galaxy S4 Stock Firmware (4.2.2_UCUAMDL)
4. Download Version Galaxy S4 Stock Firmware (4.2.2_VPUAMDC)
5. Download Sprint Galaxy S4 Stock Firmware (4.2.2_L720 SPTAMDC)
6. Download US Cellular Galaxy S4 Stock Firmware(4.2.2_R970TYUFNAE)

Stock ROM For Canadian Galaxy S4:

1. Download Bell Galaxy S4 Stock Firmware (4.2.2_VLUAMDJ)
2. Download Rogers Galaxy S4 Stock Firmware (4.2.2_VLUAMDJ)
3. Download Telus Galaxy S4 Stock Firmware (4.2.2_VLUAMDJ)

Stock ROM For International Galaxy S4:

1. Download International GT-i9500 Galaxy S4 Stock Firmware
2. Download international GT-i9505 Galaxy S4 Stock Firmware