UBUNTU steps: Download Flasher 3.5 from: http://tablets-dev.nokia.com/maemo-d...-downloads.php Extract flasher 3.5 Xterminal: cd /path/to/flasher 3.5 Turn off the device, and leave Xterminal open. Download the firmware version you may wanting to reflash. Put the File.bin in the flasher 3.5 directory (where all the flasher files are) Press hold "U" and plug the USB into the device (of cause you have to plug the other end to the PC) Keep holding until you see "NOKIA" do not let go of "U" yet. Keep holding. Now to back to Xterminal and type: sudo ./flasher-3.5 -F RX-51_2009SE_10.2010.19-1.002_PR_COMBINED_002_ARM.bin -f -R (the bin file is my device version, replace it with the one you've downloaded) If it say: Suitable USB device not found, waiting Unplug the USB from the N900 while holding "U" button still. Wait until you see a NOKIA logo and a USB icon in the top right corner. Now it should be starting the installation....