If you have a BKK B5001 and you want to Install Stock Firmware ROM on BKK B5001. Here we will guide you to install official stock ROM on your BKK B5001. Download the required file to either upgrade or downgrade your BKK B5001. This tutorial in We used a tool (software). that known as SP Flash Tool which is very simple and easy. You can just flash the firmware on BKK B5001 using the Smartphone Flash Tool. Follow the tutorial steps to flash the firmware on BKK B5001.