Click "Download" in the tool, then connect your phone to the PC while holding the Volume buttons (depending on the model).
This represents the specific build number. Using the correct version is critical, as flashing the wrong version can lead to permanent hardware damage. Common Reasons to Use This Flash File Pd1731-a-1.8.7 Flash File
Install the VCOM or MTK USB drivers on your computer so it can communicate with the phone in "Download Mode." Click "Download" in the tool, then connect your
When your phone starts up but gets stuck on the logo screen indefinitely. Click "Download" in the tool