A small Windows program called OST Tool (Online Service Tool) enables you to flash or install the stock firmware (ROM) on Nokia mobile devices.

The OST Tool’s most recent version as well as earlier versions are available here on this page.

Features of OST Tool

Installer & Portable Application:

It comes as an Installer Application, as well as a Portable Application. The installer version automatically installs the supported USB Drivers on the computer. Whereas, Portable Application doesn’t come with USB Drivers.

Flash Firmware:

It helps you to flash or install the Stock Firmware on Nokia Devices. All you need to have is the correct firmware (ROM) of your Nokia Device > Install the Nokia Driver > launch the Tool > Click on the browse button > Locate the .nb0 file from the firmware folder > Click on Next to Start the Flashing process.

Support Nokia Devices:


It comes in support of the Nokia Mobile Devices. Once you have installed the correct Nokia Drivers on the computer, OST can easily detect the connected Nokia Device and get ready to flash or install the firmware.

Support .nb0 and .mlf Format:

It supports flashing or installing the .nb0 and .mlf-based stock firmware on Nokia Mobile Devices. You can easily find the .nb0 or .mlf file in the Stock Firmware of your Nokia Device released by the Company.

Download OST Tool

OST 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 OST Tool, then use the following links to get it on your computer:

v6.0.4OST_v6.0.4.zip (tested)


v6.1.2OST_v6.1.2.zip (tested)

v6.1.8OST_v6.1.8.zip (tested)



v6.2.8OST_v6.2.8.zip (tested)

v6.3.7OST_v6.3.7.zip – Latest

Comments are closed.