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[TUT] How to flash stock rom firmware flash file pac file with Spreadtrum Upgrade Tool?

How to flash stock rom firmware flash file pac file with Spreadtrum Upgrade tool ?

some of android smartphone can be flash through spreadtrum upgrade tool which have .pac file format of firmware.

So lets start tutorial how to flash stock rom with spreadtrum upgrade tool.

  1. first of all you have to need few thing. a PC/laptop with windows os, a pac file of firmware and spreadtrum upgrade tool.
  2. you can download spreadtrum upgrade tool from here —->> (Click here to download spreadtrum tool)
  3. Now as you finished all download then you are ready to start.
  4. some time you also need appropriate USB driver too so download them from your mobile manufacture  website and install them. usually these usb drivers install automatically through your smartphon to pc.
  5. so lets start…
  6. First run the upgrade tool by clicking on “spreadtrum upgrade tool.exe”













  1. now As you run this tool you have to click on “load packet” button.




  • now as you click on load packet a pop window will open then select your download.pac firmware file and click on open.
















  • your firmware will be loaded on upgrade tool, you can check your firmware version here.








  • now its time to prepare your mobile to download. well its little bit difficult process. some time you have to manually install correct usb drivers or some times it happen automatically as you connect your mobile. switch off you mobile and connect it with usb cable. you will see tool will recognize your mobiles bootloader. now click on download button on tool.






 Video guide to flash stock rom with spreadtrum upgrade tool by Amauri Mario



Download should start now. Don’t touch your mobile during this process otherwise you can damage your devce during this process.

hope this will help you.

keep visiting


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14 thoughts on “[TUT] How to flash stock rom firmware flash file pac file with Spreadtrum Upgrade Tool?

  1. Michael D'sa

    Not Working

    I tried to flash stock rom of Micromax bolt a075 using this software, but it refused to recognize my device. Please suggest some method to flash my device.

    1. A2zAndroidROM Post author

      if your device is in booting condition then enable USB debugging option in setting menu of your mobile and then conenct it to computer. and try it again.

      if still not working then manually Download drivers for your device from micromax official website and install them .

  2. Surjyanka Roy

    i too hav tried this on my mx bolt a075 but always i get this-“Bin packet version not supported”……..plzz help…

  3. Mridul

    Trying to flash my micromax A075.I am getting a problem while installing SCIUSB2Serial drivers.Tried using xp,windows 7,8 32/64-bits but with no help.

  4. suraj

    this method is not working on micromax bolt a59.when i click download button it shows nothing.do i need to root my phone for flashing?

  5. Mridul

    @Surjyanka Roy-Try spreadtrum upgrade tool 2.9.9005 u wont get bin packet error for micromax a075.
    Actually i cant install the SCIUSB2SERIAL drivers.Though the installation gets executed i cant see it in the ports.n if possible tell me the boot key for micromax a075 to use in spreadtrum tool.

      1. Himanshu

        Is it merely copying of the files to the phone?If so can the same be achieved by using the fastboot mode?
        I am trying to restore a device(micromax bolt a27) in which I had copied a wrong .img file into the systems folder and phone is not starting up now.
        I tried the ResearchDownload.exe tool after installing the USB drivers but as soon as I load the .pac file and attach it via USB its vibrating endlessly and even after a long time I was not able to see anything in the status panel of a tool.
        Is it possible to extract the .img files from the .pac and then manually copying them via fasboot?

        Please suggest.

  6. Akash

    I tried spreadtrum upgrade tool but always it shows that ‘Bin packet version is not supported’. I also tried with recovery mode but my phone got hanged on a logo n then it restarted automatically. So what can i do ?

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