Nokia developers have released latest flash files of nokia asha 300. You can get it from nokia official server with free of cost. The flash files official link we have shared at below of post. Flash files always used for do software or update mobile old firmware. You will need to flash your mobile at those stage when your firmware has corrupted or outdated. If your mobile working slow you can recover this problem by online updating. You can use different tools or boxes for flashing. Some tools allows you to flash your phone through usb cable without flashing box. Flashing tools only support for usb supported devices. If your mobile can support for online updating you can update its firmware from nokia servers. Nokia servers putting latest updates of flash files on its official server.
Before flashing you will need to take a backup of you 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. Now you can download latest flash files of your mobile from below links.