Be cautious with downloading pre-made hosts files from untrusted sources, as these can block legitimate services or introduce malware risks. Always make a backup of your original hosts file before applying changes.

If the hosts file permissions are not set correctly (usually rw-r--r-- or 644 ), the Android system will ignore the file.

If your Ad-blocker is failing, try these steps based on common community solutions:

Open AdAway, select "revert" or "disable blocking," then re-enable it to rebuild the file.

To get the most relevant advice for your "host fail" scenario, let me know: Are you (using Magisk/AdAway)? What is the exact error message you are seeing? Did this happen after a system update or installing an app?

Sometimes the error is not in the file but in the network; if your device loses connection during DNS resolution or hits a captive portal, you may see UnknownHostException . 2. Troubleshooting and Fixing Host Fails

Modern Android versions use systemless rooting. If systemless mode is disabled in AdAway but enabled in Magisk, the file will not update properly.

I can then provide specific commands or settings adjustments.