100% Tested Stock Firmware of LeTv Le1S x507 Indian Version
5.5.008s
How To Flash
Follow this...
Extract "X507_Stock_Rom.rar" and install MTK_USB_Windows_Driver drivers inside rar file
1. Goto "SP_Flash_Tool" folder and open "flash_tool.exe"
2. Select "Download-Agent" as "MTK_AllInOne_DA"
3. Select "Scatter file" from "X507_Stock_Rom" folder
now all files will be selected.
4. Change "Download Only" to " Firmware Upgrade"
5. Now Very Imp Step Press together Cntl+Alt+S
This will Enable "Security Mode" and "Authentication File"
option will be Visible below "Scatter file" option.
6. Now Click on "Auth File" Option and Select "auth_sv5.auth"
file From SP_Flash_Tool" Folder
7. Hit "Download" Button.
8. Press volume up key and
Connect USB cable to mobile in Powered Off Condition
Video Guide
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