You may want to skip to the post from HowardForums lower in this page to read personal experiences with this subject first.

If you want mp3 ringtones you have to download them from Tracfone's web site. We have not found a way to send an mp3 file to the phone successfully. And even those mp3 files have limited assignments as ringtones.

You can send usable midi files to the phone using the email address of the phone. You can download the files from ringtone sites or create them yourself. Send the file as an attachment to an email. The address for the phone should be the phone's 10digitnumber@mms.att.net This is assuming the phone is activated with AT&T. As far as I know, all Tracfones with data services are activated on AT&T.

When the message arrives at the phone the display will show 1 New Msg! Waiting for download

You can now assign these files as ringtones. I have not had any trouble assigning these files as ringtones but some have posted that they have to let the file play completely through before selecting it for a ringtone or it will not assign properly.

Okay I've played around with the system a bunch and here is what I've discovered. (Parts of this are on other threads, but I thought I'd put them all in one place.)

As most everyone knows Tracfone disabled the USB interface to the phone. The only way I've discovered to get wallpaper and ringtones is to download them to your phone using 1) Tracfone website or 2) upload via MMS.

Tracfone also has two different memory sections in the phone. One is listed as "preloaded and downloaded media files", contains the original pictures/sounds and anything you download from the Tracfone site. The space allocated for this is 1131K. The second is "additional storage device" and contains anything uploaded via MMS. The space allocated is 489.5K.

You can get an MP3 file into the phone, uploaded via the Tracfone website, but Tracfone only lets you use it as your main phone line. If you have uploaded multiple MP3's you CAN NOT use them as the "specific ringtone" of person's in your phonebook.

I guess because of this, it really doesn't matter that if you try and import MP3's via MMS, it won't let you. (You get a "One or more of the message components have been deleted by MMS adaption" message.)

The same is true if you try and send MMF or AMR ringtones.

The only ringtone that you can send via MMS are mid (polyphonic) ringtones. (And a lot of these can be found free on the internet.)

You can actually send a MP3 file attachment via MMS to the phone if you change the MP3 extension to mid. It will pass through the MMS filter and will actually play on your phone. You can even save it, but when you go back to play it in the multimedia section, it gives you a "format not supported" message. (So it's basically useless to save it as a sound.) WAV files can also be played via MMS. (Although they are usually too big to send - and they can't be saved.) I would use these two, preferably the mp3/mid one, if you are sending a message to a friend with a W370 Tracfone and you want to send a musical/voice message. (Sort of like those "singing" cards.) If the message is saved in the inbox, the sounds will play each time you read it.

I found that both GIF and JPEG wallpaper can be uploaded to the phone. This phone has a 128 x 160 display. I found that if you crop close to these dimensions, and use a compressed jpeg, you can get a picture to be down to around 3K or 4K. Compressing it to this size does lose a little bit of clarity, but it's a cell phone display. The average preloaded display is around 20K.

So basically if you don't download anything from the Tracfone website, you only have 489.5K of space. That comes out to around 20 mid ringtones (average arond 20K per) and around 20 JPEGS (if compressing down to 3K - 4K). If you want to carry around more, you have to download a few items from Tracfone and place them in the larger memory.

There isn't a lot of use for a bunch of MP3's, since you can only use it as line 1 on this phone. That said the cost of downloading from the Tracfone site is not what is "listed".

The following might not hold true for all, but I think it will. Tracfone list three different cost for their downloads. $2.99 (8.97 units) for MP3 downloads, $1.99 (5.97 units) for polyphonic downloads, and $1.99 (5.97 units) for wallpaper downloads. The thing is the units are calculated at $.33 per unit. Which is what you would pay if using a 30 or 60 minute card. For those of you that have double minutes, then the cost is effectively half. And for those that have got the cost down to $.10 per unit (200 minute card with double minutes bonus) then MP3 downloads cost 90 cents, polyphonic and wallpaper cost 60 cents. (I'm assuming you use the units to pay for them and your cost are the same as it shows up when I went to purchase my downloads.) This is in addition to the cost of using the WAP browser function of the phone, which is how Tracfone uploads this into their section of the memory. (And they don't group them, they are sent as individual messages.)

Finding out about the single MP3 use restriction and the large amount of free polyphonic ringtones available, I guess I'll just fill my phone up with those. (And I'll use the MP3/mid trick to send musical/voice messages to my friends.)

Only thing I need to add to this is I found out the phone uses the "preloaded and download media files" section to also save any messages that the phone receives.

So this phone has a total of 1.6MB for messages, wallpaper and ringtones.

Since I don't get many message (and I delete most of them anyway) I decided to use half of the preloaded and downloaded media files section to save my wallpaper and ringtones. I did this by first organizing what ringtones/wallpaper I really needed and which ones I will use occasionally. Those that I use occasionally I deleted from the "additional storage device" section of the phone. (I made sure I had backups of these files on my home computer.)

I then grouped those into sections on my home computer, so they would be easier to find. I cleared my saved messages on the phone and started sending emails with the the specifics (ie Family Photos, Star Trek Photos, Star Trek Tones, etc.) in the subject line and the attachments for that category.

Now the first few messages I have in my phone are my "spare" wallpaper and ringtones. I can upload them into the phone, whenever I feel the need to use them. (Just have to go and open one of these saved messages, and upload whatever one I want to use at that time.)

With this, and the earlier post where I've converted the jpegs to 3-4K and the mid files to 20K, I'm carrying 10 wallpaper and 15 ringtones that I'm using all the time. (This takes up 320K of the 489.5K in the additional storage device) I'm also carrying an additional 75 wallpaper and 10 ringtones saved in messages. (This takes up 500K of the 1,131K for messages and preloaded and downloaded media files.) With the "spare" 160K+ that haven't used in my additional storage device section I can upload a few wallpaper/ringtones for use every now and then straight from the message section. (Approx. 5 additional ringtones and 15 wallpaper.)

This only left me 500K for incoming messages, but for my purposes that was more than enough. (The original Motorola W385. of which this phone is based, only had 500K for everyting in the phone.)

Not bad, to be carrying around 85 wallpaper and 25 ringtones for use in this phone. (Although you can only use approximately 22 ringtones at a given time, that's more than I ever will use.)

NOTE: For some reason the messaging system doesn't like spaces in attachments. The phone will allow for them when you save the name or rename them, but if you try sending an attachment with a space in it, it will default to "file". (ie don't send Seven Of Nine.jpg, but send SevenOfNine.jpg or Seven_Of_Nine.jpg to keep the file name from defaulting to "file". It's easy to put in the spaces later in the phone, rather than retyping the whole name.)

These are some sites that can provide lots of help and information.