WARNING: Internal SD content will be erased
- Go here and download the ROM of your country/region
- Download smartflash and drivers from here and install them
- Run SmartFlashTool_P990.exe
- Turn the phone off, remove the battery and connect the phone to PC via USB while holding down the volume down button.
- Now you should be able to see the software upgrade screen, and COM port of smartflash will change automatically.
- Now in smart flash select "ROM Copy D/L"
- Make sure that "Normal Mode" is checked and "Erase Cal" is NOT checked
- In AP Bin click browser and select the (BIN) file
- In CP Bin click browser and select the (FLS) file
Click start, sit back and wait 
