From a windows PC



You first need to download three pieces of software.

The first software you need is called "Maemo Flasher", and this is the program that needs to be installed on your PC and can be found here:

http://tablets-dev.nokia.com/maemo-d...-downloads.php



Download the latest version of Maemo Flasher (which is currently 3.5 at time of posting this), and make sure you download the .exe file.



Install that file.





Next you need the software for the N900 itself.

That can be found here:

http://tablets-dev.nokia.com/nokia_N900.php



This page will ask you to enter your IMEI, with very clear instructions on where to find it.

Follow the on screen prompts until you reach the download section.



There are two pieces of software you need to download from there.

1.eMMC content - This is the package to erase all data held on your 32GB storage.
2.OS 2009 - This is your operating system.


There is only one eMMC package available, so download that one. Its called Vanilla.
Download the OS package that matches the Version on your device. As shown in the image above, using the red text as an example.

For people that purchased the N900 in the UK, the OS package will probably be the same as the red text. But make sure you check.



Software downloads complete.



Place these two software packages in the following location on your PC.

c:\program files\maemo\flasher-3.5



You should now have two .bin files in the directory above.



Next steps.





Updating the N900 OS



1.Your battery needs to be 100% full to prevent any crashes which could leave your phone dead.
2.Turn your N900 off.
3.Press and hold the U key on the keypad.
4.Insert the USB cable (a USB symbol should appear on the top right of your N900 screen, and also the Nokia logo in the centre).
5.You can now let go of the U key.
6.On your PC: Navigate to the Start Menu and select Run.
7.In the Run box, type: cmd. Then OK
8.In the command window, type: cd\program files\maemo\flasher-3.5
9.Type: flasher-3.5 -F RX-51_2009SE_1.2009.42-11.203.2_PR_F5_203_ARM.bin -f -R