ISO standards for 3G phones states that for recording devices a phone is expected to use AMR as its sound file format or Adaptive Multi-Rate audio codec. This is why whenever we record some audio the file format is in .amr, well for most phones that is.
However AMR format does not sound well when transferred to our computers, if you do not have high end phones your AMR file will not sound as good in the computer the way it did in your phone. This is where converters come in and I found a freeware that works like magic. It can convert an AMR file to MP3 and vice versa. It can even do bulk conversion, isn't that nice.
See if you have an MP3 file that you want to be stored in your phone however you have limited storage space you can convert this to AMR since it will compress file thereby minimizing the file size.
If for example you would like to create your own tone and has enough storage space to spare, just convert it to MP3 and you'll be looking hip with your own personalized ringtone.
There are a lot of converters available in the net but this is the best one I could find so far. No problem with the file size of this software, no problem with liscense keys.
The design is really simple though, nothing like those hippy designs but I guess this is because this software does not need to use a large space in your computer just to look sleek, it is the function that matters.