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These are the instructions on how to use SUT L3 Tool to flash NB0 stock firmware on any Android Device.
Requirements: Your Android device should have atleast 20-30 percent of battery to perform the Flashing Process.
Step 1: Download and extract SUT L3 Tool and Drivers. After Extracting you will be able to see the following files:
Step 2: Install SUT L3 Tool on your computer.
Step 3: Power Off your Android Device.
Step 4: Download the Stock Rom (nb0 or ffu) that you want to Flash on your Android Device and extract it on your Computer.
Step 5: Now, Open SUT L3 Tool (you have installed this in Step#3) on Your Computer and Click on Next Button to Continue.
Step 6: Once SUT L3 Tool is launched, Click on […] Button and locate the firmware (should be .nb0 or .ffu extension).
Step 7: Once You have successfully added the firmware in the SUT L3 Tool, Select “Enable Emergency Download Process” under the update option.
Step 8: Now, Connect your Android Device to the Computer (make sure it is power off) and Click on Next Button to Begin the Flashing.
Step 9: Now, SUT L3 Tool will flash the firmware on your Android Device.
Step 10: Once Flashing is completed, you will be able to see Green Pass Status.
Step 11: Now, close SUT L3 Tool and disconnect your Android Device from the computer.
Congratulations, Now your Android Device is successfully running the Stock Rom you have Downloaded.
[*] You can follow the above tutorial to flash all types of Intel and Mediatek Chipset Based Firmware (comes with .nb0 or .ffu extension).
[*] Take Backup: Take a Phone backup before using the Smart Phone Upgrade Tool as because during the flashing process your personal data will be removed.
[*] The above tutorial allows you to Flash Stock Firmware on your Android Device without violating the Device Warranty.
[*] Credits: SUT L3 Tool is created and distributed by Intel, LLC. So, full credits goes to them for sharing the tool for free.