Step :
1. Press Power + Volume Down + Home button to download mode
2. Connect USB to PC + Run Odin 3.0.7
3. Uncheck auto reboot & click PDA browse file "
CWMtouch_i9082_chotu.tar.md5" and start update 4. Close Odin and remove battery on your phone
5. Press Power + Volume Up + Home Button to Recovery Mode
6.
Select install zip from sdcard and choose zip from sdcard menu 7. Install Fix-Recovery.zip 8. Return choose zip from sdcard menu and install UPDATE-SuperSU-v1.25.zip 9. Return main menu and select reboot system now 10. Check Super su on your Phone
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Download Mirror
Download Mirror
Download ROM Samsung Galaxy Grand Duos (GT-I9802,GT-I9082L) Jelly Bean 4.1.2 THL here
GT-I9802 Jelly Bean 4.1.2 THL
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GT-I9802L Jelly Bean 4.1.2 THL
Download
Odin v3.04
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