DA files, or Download Agent files, play a crucial role in flashing and unlocking MediaTek smartphones like the Vivo V21. These files help bypass secure boot protections that prevent direct flashing or unlocking on many devices.
While many unlocking tools can automatically detect phone models, sometimes the Vivo V21 may not be supported or flashing may fail due to boot security. In these cases, using the correct DA auth files allows the tools to properly communicate with the device and complete flashing or unlocking tasks.
If you experience errors during flashing or unlocking your Vivo V21, loading the proper DA file is often the key to a successful operation.
How to Use Vivo V21 DA Auth Files with Popular Flashing Tools
SP Flash Tool
- Make sure you are using Flash Tool version V5.1812 or later.
- Open SP Flash Tool.
- Click the “Choose” button next to the Download Agent field.
- Select the appropriate Vivo V21 DA file from your computer.
Avengers Android MTK
- Launch the Avengers Android MTK tool.
- Go to the Main section.
- Find the Download Agent option on the left.
- Click “Select Custom Loader” and load the Vivo V21 DA file.
Ultimate Multi Tool MTK
- Open Ultimate Multi Tool MTK.
- Navigate to your desired function.
- Locate the “Select Download Agent” box at the top.
- Click “Custom DA” and choose the Vivo V21 DA file.
CM2 Infinity (CM2MT2)
- Run CM2 Infinity.
- Access the Platform Main section.
- Enable the “Custom Settings DA Auth Cert” option.
- Press the DA button and upload the Vivo V21 DA auth file.