Lenovo A850 Firmware Stock Rom TESTED

By | September 9, 2017

Lenovo A850 Firmware Stock Rom TESTED

Lenovo A850 Firmware official flash file for deadbootbootloop, Hang and infected virus and other software problem. Flash using flashtool for free, Just browse the scatter file. Download the firmware below and follow the instruction.

Things to know before start flashing

Before flashing, you need to understand that all your files and installed third party application etc will be deleted and restore back to original as you bought it. Flashing new firmware will fixed only software problem, here is the list of the common problem that is tested to be solved in flashing the stock rom below;

  • Infected Virus – Also known as Monkey Virus where when you connect to Internet, there is automatically download apps or some popup screen and sometimes automatically turn on WiFi or data connection without doing it. The virus will not remove though hard reset or formatting your phone. Installing new firmware is the best solution.
  • Deadboot – Flash other firmware but it doesn’t turn on after flash then you can found the solution here.
  • Unfortunately Error – This is when you open some apps it will popup Unfortunately, App has stopped. If cannot fixed through clearing the data, then flashing new firmware is also the solution.
  • Stuck or Hang in Logo – The reason for this is either when you install incorrect Rom. Try to hard reset first but if still stuck, then flashing firmware is also the solution
  • Too Many Pattern Attempts or forgot password –  This is just an alternative solution if you cannot hard reset your android phone.
  • Clone  boot loop.

Firmware Download

Official Firmware File: Lenovo A850_A850i
Alternative Firmware File: MT6582_Lenovo_A850_ROW_4.2.2

Which firmware should you download?

 If your phone is already dead and looking for solution, choose Official firmware file which is A850i, The alternative firmware is for A850 only. Both are tested so you can try them both.

Guide Flash Rom Android Smartphone With ResearchDownload

Early steps to Install Stock ROM

  1. Download and Install Spreadtrum USB Driver on your Computer
  2. Download and Spreadtrum Upgrade Tool on your computer

How To Flash

  1. Download and Install Spreadtrum USB Driver on your Computer. If in case Spreadtrum Driver is already installed on your computer then Skip this Step.
  2. Download .pac firmware for your device (Itel, other)
  3. Download and extract Spreadtrum Upgrade Tool on your computer.
  4. Now, open UpgradeDownload.exe. Once Spreadtrum Upgrade Tool launched, connect your Android device to the computer (make sure your device is switcheded off).
  5. If Smartphone is securely attached to the computer, click on the Load Packed Button and add the .pac file (stock ROM which comes as .pac).
  6. Having successfully added the.Pac file in Spreadtrum Upgrade Tool, click on the Start Downloading button to begin the flashing.
  7. During the flashing process,, your device will restart automatically.
  8. Once flashing completed, you will be able to see the Green Passed Message in Spreadtrum Upgrade Tool.
  9. Now you have successfully flashed your Android Device using Spreadtrum Upgrade Tool.
  10. Note after flashing phone on just 5 to 10 mins.
  11. During the flashing process,, your device will restart automatically. Once flashing completed, you will be able to see the Green Passed Message in SPD Upgrade Tool
  12. After flashing process, starts, it might take up to 5-10 minutes. So, keep patience and wait.

Guide Flash Rom Smartphone Android With SP Flash tools

Initial Steps to Install Firmware Lenovo A850

Download and install MTK  Android USB drivers

Download And Install SP Flash Tool

How To Flash Lenovo A850

  1. First, you need to download and install SP flash tool
  2. Download and install MTK  Android USB drivers
  3. Then download Firmware file/Flash file/ROM for your phone
  4. Your phone must have 50 % charging before this process,
  5. switch off your mobile remove the battery (if removable) reinsert the battery and plug the USB cable in charging socket
  6. Now open SP flash tool.exe
  7. When SP flash tool open, go to download button in SP flash tool
  8. In download tab, click on scatter load button
  9. After locating the scatter tab, click on the download button
  10. Now connect your smartphone with a USB cable and press volume up or volume down key for easy detection (remove and re-insert your phone battery if it is removable)
  11. Now flashing is completed, a green ring will appear in SP flash tool
  12. Close SP flash tool on your computer and unplug phone
  13. Power on the phone and enjoy
  14. After flashing process, starts, it might take up to 5-10 minutes. So, keep patience and wait.

Guide Flash Rom Smartphone Android With QPST Soft

Prerequisites for Installing Rom

How To Flash ROM

  1. Download and install QPST 2.7.422 with QFIL and Qualcomm USB Drivers.
  2. Turn off the phone. Hold Vol+ button and plug-in USB Cable. The phone will vibrate one time; the screen will be black. It’s Download Mode.
  3. There should be the device called in device management:
  4. Qualcomm HS-USB QDLoader 9008 (COMXX)
  5. In any other case, you have to install drivers manually.
  6. Run QFIL.
  7. Click Browse in Programmer Path and choose prog_emmc_firehose_8916.mbn
  8. Load XML in Download Section:
  9. First select RawProgram File: rawprogram0.xml
  10. then Select Patch File: patch0.xml
  11. Check all inputs is correct and click Download under Load XML button and wait about 5 to 10 minutes:
  12. After flashing process, starts, it might take up to 5-10 minutes. So, keep patience and wait.

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