Set the ringtone: There are a couple of methods to set the downloaded ringtone as your default or assign it to specific contacts:

For setting as the default ringtone: Go to your phone’s Settings, then Sound or Sound & Vibration settings, and look for the option to change the default tonos para celular de llamadas. Select the ringtone from the list of available options.

For assigning to specific contacts: Open the Contacts app, select the contact you want to assign the ringtone to, tap on the Edit option, and look for the Ringtone or Sound option. Choose the downloaded ringtone from the list.

Alternatively, use a ringtone app: You can also use dedicated ringtone apps from the Google Play Store, such as Zedge or Ringtone Maker, which provide a vast collection of free ringtones. These apps typically have built-in features to help you download and set ringtones directly from within the app.