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Activation via a key file only works for an application that has been downloaded directly from Doctor Web's site (this method is not suitable for an application installed via Play Market!).
Copy the key file to any folder in the device's memory or to its memory card.
You can extract the archive's contents and copy just the file with the *.key extension or transfer the entire ZIP archive to your device;
The key file will be installed in the system, and a message notifying you about this will appear on the screen.
If any error messages appear, try to activate your license using a different network connection.
If you continue to encounter problems, a detailed diagnostic is required. Submit a written request to our technical support service. Please attach the error screenshot to your request, and enter your serial number.
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