so when you download it, it usually ends up in a folder on your phone called "downloads" or something similar depending on the phone. Now do you know how to change your ringtone on this phone? you usually go into some kind of menu like sound or alert or something, we wont know the actual name because it varys from every phone model but if u tell us, we may be able to narrow it down for you, once your in this menu, you will see a list of "preinstalled" ringers which came with the phone, you also should see the one you downloaded on the list or have the option to select a different folder to find where you saved it to, very similar how you find files in windows. I also strongly suggest NOT keeping it in the downloads folder, you might inadvertently wipe or delete it. if a folder exists for ringtones try moving or copying it there or create the new folder if one does not exist.