itunes to ringtones

Ok, so i got a new nokia 6133, which is a great phone by the way. The only down side from it is that you can't use mp3s as ringtones, because tmobile wants you to buy their crap. however, i read some where that if you conver the mp3 into an AAC or WMA file it won't be a problem. Does anyone know how to do this? I own the music, I own the phone out right (bought without contract), so t-mobile shouldn't be able to tell me what to do with my phone and my music.... B&ST&RDS!

If anyone could help that would be great, thanks.

 

I did try all of that, it worked (thank you). It plays on my phone via the music player and I did shrink the time down to 15 seconds so that it wouldn't be because of that. But it still won't play as a ringtone. I guess t-mobile fixed the phone so that you couldn't do that. Those little #%$#@ers If anyone finds a solution let me know, cause i'm searching. The error says, "can not be set as ringtone" or "not allowed by activation key".

 

oh, i know, i've had plenty of phones--way too many phones. The other nokia i have had work just fine. And mp3 ringtones work on the nokia 6131, which is the same phone, made for europe, not specifically for t-mobile.

But even logically, its easy to make an mp3 a ringtone on a phone. But to make it not one, when you sell ringtones for 2 bucks a pop, now that's making sure you make money. Sorta like verizon does with a lot of their phones.

***besides, i called both t-mobile and nokia and asked them about it. They both said it was t-mobile's doing.

 

anyone know where to go?