Unrestricted mobile data is only available on Android version R or newer.
If you’re using one of those carriers, you may also see an option to download on “Wi-Fi and unrestricted mobile data.” Selecting this option will allow videos and playlists to be downloaded when your device has a Wi-Fi connection or is on an unrestricted mobile data connection. Some mobile network carriers provide access to unrestricted mobile data, which is data that does not count towards any quotas or limits. To allow video downloads on your mobile network: On certain mobile devices, videos and playlists will be downloaded only when your device is on a specific connection type - a Wi-Fi network is typically the default. To remove a downloaded video, tap Downloaded and select Remove. You can view your downloaded videos in the Library or Account tabs.