Caution: We do NOT recommend you to flash the preloader.bin file on Mediatek devices. Backup: We recommend taking a backup of your data before flashing the Stock Firmware because flashing the stock firmware may permanently delete your data from the device, and you won’t be able to recover it. SP Flash Tool: You can download the latest version of SP Flash Tool from SP Flash Tool for Windows or SP Flash Tool for Linux page.
How to Flash Panasonic Eluga A4 Firmware (Stock ROM)