How to use the Broadcom Multidownloader Tool
Step 2: Install the USB driver.
Step 3: Power off your Android device.
Step 4: Download the Stock ROM that you want to load for your Android device and extract it on your computer.
Step 5: Now you run the Broadcom Multidownloader program that you extracted on the computer in step 1:
Step 6: After you’ve finished running the Broadcom Multidownloader program, click Settings -> select Configuration:
Under Configuration options -> press […] -> point the path to the folder containing the ROM that you downloaded in step 4:
Step 8: after selecting the ROM file -> click the Apply button:
– Select Download Mode as “Upgrade (Keep Factory data). Then click Apply
– After Apply, return to the main interface, click Start. From the phone, power off or remove the battery. Insert cable and battery. The software will automatically load
Step 9: now Broadcom Multidownloader will start loading the original ROM on your Android device:
Step 10: Now you can turn off the Broadcom Multidownloader program and disconnect your Android device from the computer.