Flash files are used for do software or update mobile old firmware. The latest flash files of Nokia 5250 have been released and free downloading link is available for download. Your mobile firmware consist on three main parts like mcu, ppm and cnt. So your mobile's all date stores in these three important files. If you wish to flash your mobile with its latest flash files you will need to download its flash files first. You can use different tools or boxes or for flashing. Some tools lets you to flash your mobiles without flashing box. If your mobile firmware have't fully corrupted you can recover your mobile firmware by online updating. Nokia or other developers always releasing and putting free downloading links on its official servers for mobile users or flashers. If you wish to flash your phone with flashing box first you will need to put download flash file in one folder. Then select your flash files from folder during flashing. Some times your mobile working so slow or completely break with the reason of its firmware at this stage you can recover your mobile firmware original condition by flashing.
Before flashing please don't forget to take a backup of your important data like images, messages and contacts. After flashing you will lose your all of data and your mobile will restored in its original settings. You can download latest flash files of your mobile from below provided links.