Anyway, before I left work I bought a USB cable for my new phone, so I can download music to it more easily. Its regular price is $10 but I didn't pay that much; while I am not at liberty to disclose my discount I can sum up my feelings on the subject by quoting Heinlein's Have Space Suit--Will Travel: "I paid a price so low I merely screamed." (...I think that was an editor's typo. I'd bet the original manuscript read "...I nearly screamed" but it's too late to fix it now, isn't it?)
In any case I have further customized my phone by installing, as its home screen background image, the corporate logo of a fictional interstellar conglomerate from my SF universe.
Ringtones will be more difficult. There is not an easily identified place for them to be put; I think TracFone has protected the ringtone directory so that one must buy custom ringtones from them. I may have to buy one just to see where they put them, and even then it may not be visible. (Bonus "craptacular" points if the ringtones use a nonstandard format, but the ringtone filenames I see when looking through the defaults all end with ".mp3", so we'll see.)
Just drop the files in the Audio folder of the memory card. Files under 300 kb seem to be automatically recognized as a ringtone, as stated in the User Guide. I noticed on my LG840G that they seem to be sorted by date. I've added about a dozen ringtones so far without any problems.So, we'll see.
...and, in fact, I have just managed to generate and install a custom ringtone, so it looks like all that stuff, above, is right.
Now all I have to do is create some others. Whee!
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Anyway, that's it.