If all of the above techniques do not work with your Nokia 105 2017 or if you prefer not to buy new accessories, you can still use one of the numerous free '3G Uploader' services available online. A search on Katapulco should retrieve plenty of them. 3G uploaders work as follows: Save your own music on their web site and they will provide a temporary URL. Navigating to that URL with your Nokia 105 2017's browser should download the free ringtone.
Here are some of the free ringtones (Nokia 105 2017-compatible) offered here at MartinsRingtones.com:
Free Horror MIDI Ringtones Free Ghost Ringtones Free Ringtones-a-gogo Free Techno Ringtones Listen To All Our Free Polyphonic Ringtones