If your phone won't turn on or show the Nokia logo and then dies, flashing version 8.75 can often recover it.
Ensure your battery is at least 70% charged. If the phone dies during the update, it may become permanently "dead". nokia x2-01 software update 8.75 download
Flashing completely restores the system, which is a common way to remove a forgotten security lock code. If your phone won't turn on or show