"Reflashing" your phone with the original Nokia firmware can solve many problems and is necessary in a number of circumstances, but a lack of documentation has resulted in a lot of misinformation and confusion. Hopefully, this guide will demystify the process and help bring ailing N9s back to life
Warning: Improperly using flasher could damage your phone and void your warranty. However, following these directions precisely to use flasher to install "stock" Nokia firmware images is quite safe, and can fix problems that would otherwise require warranty service. In any case, flashing your phone is at your own risk. Do not use this guide if you aren't somewhat familiar with the command prompt/terminal on your operating system. While many users have experienced success with this process, it is not officially recommended by Nokia in any way. Read the entire guide before you start.Warning: Installation of generic firmware images on certain carrier-branded phones seems to be blocked - if you're currently running a carrier-branded firmware image, it's recommended to wait for more details.
Warning: Do not modify the product code of your N9. Doing so is not necessary to replace your phone's firmware, and some programs for changing the code could cause problems (namely NSS Pro).
