Today it is getting more common that people are flashing custom as well as Stock firmware on Android smartphones, right. So if you also looking to flash stock firmware on your Android smartphone then you should download SP flash tool which helps you to flash the firmware on Android smartphones easily.
Flash Android smartphones (Using SP Flash Tool)
Just make sure you have MTK Android device then find your stock firmware from XDA developers forum. Every Android smartphone has got its own pack of STOCK firmware.