How and How to use OST Tool


Smart Phone Upgrade Tool is a small application that allows you to flash stock firmware on your Qualcomm Smartphone and tablet.

Here on this page, we have shared the latest version of the Smartphone Upgrade Tool and the previous versions.

Smart Phone Upgrade Tool

Features of Smart Phone Upgrade Tool

Installable Application:

Smartphone Upgrade Tool comes as a setup file, which means you need to install it first on your computer, then only you will be able to use it properly.

Easy to Use:

It allows you to quickly load the Qualcomm-based stock firmware (.xml) on the tool and flash it on the Smartphone and Tablet quickly in a few clicks.

Refresh Port:

It comes with a Refresh Port Button, which allows you to automatically detect the connected Qualcomm smartphone and Tablets without restarting the application.

Supports Qualcomm Devices:

It allows you to flash stock firmware on Qualcomm smartphones and Tablets only. It doesn’t support devices having other chipsets than Qualcomm.

Download Smart Phone Upgrade Tool

SmartPhone Upgrade Tool is compatible with all versions of Windows OS, including Windows XP to Windows 11 (x32 or x64 bit). If in case you were looking for the latest version of the tool, then use the following links to get it on the computer:

Install .nb0 or .mlf Firmware using OST Tool

    1. Download Stock Firmware (ROM) of your Nokia Device (if in case you have already downloaded the stock firmware, then SKIP this step or else you can find the Nokia Stock Firmware on FirmwareFile or through Google).


    1. Now, Extract OST Tool on your Computer (assuming you have already downloaded the tool; if not then Download OST Tool). Once you have extracted the tool, you will be able to see the following files:

OST Files

    1. Open Launcher.exe to begin the installation process.

OST Setup

    1. Now, Click on Next Button:

OST Setup Wizard

    1. Again, Click on Next Button to Confirm the Installation:

OST Setup Confirm

    1. Click on Close Button, to Exit the Setup.

OST Setup Finish

    1. Now, Copy OnlineUpdateTool.exe:

OST Copy

    1. Paste it to the OST Installation Folder (C:\Program Files (x86)\OST LA):

OST Paste

Click on Replace to Confirm:

OST Replace

    1. Open OST Tool (you can open it through the Start Menu Shortcut or directly from the C:\Program Files (x86)\OST LA Folder).

OST Launch

    1. Once OST Tool is launched, you will be able to See the Following Screen:

OST Tool

    1. Now, Click on the Next Button:

OST Next

    1. Click on the Browse Button and Locate the Stock Firmware of your Device (which you have downloaded in Step#1):

OST BrowseOST Firmware Select

    1. Click on Update Option Menu there you will see multiple Options. The Normal Download will help you to install Stock Firmware on Working Device (without wiping personal data) and the Emergency Download option helps you to install the firmware on Dead Device (will wipe personal data).

OST Update Option

Since we are using a dead phone, therefore, We have Selected the Emergency Download Option:

OST Update Option List

    1. Now, Connect your Nokia Device to the Computer (make sure device is Power Off):

Mobile Connected Computer

    1. Click on the Next Button:

OST Emergency

    1. Now, OST will begin the installation process (which may take couple of minutes to complete):

OST Installing

    1. Once the installation process is completed, you will be able to see the Download is Succeed Message at the End.

OST Success

    1. Now, Close the OST Tool by Clicking on the Finish Button and Disconnect your Device from the Computer.

OST Finish

Congratulation! Now, Restart your Mobile Device, and you’re ready to use it.


[*] Caution: Flashing or installing Firmware using the OST Tool (in Emergency Mode) will wipe out your Personal Data from the device. Therefore, take a backup before using the Tool to install the Firmware on your Nokia Device.

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