AAC-format
No. iTunes is not supported by the DSi. It does, however, support the audio format of music downloaded from iTunes.
If you format your dsi everything will erase from your dsi including ur things from your memory card.
No, there are no refunds on the DSi store.
Yes, the DSi can connect to the DSi store, from which games can be bought and downloaded.
Maybe the format of the song is not right.The format of the song/music should be compatible with the device.
Yes. The DSi has a web browser that can be downloaded from the Nintendo DSi shop for free.
The DSi Internet Browser can be downloaded for free from the Nintendo DSi shop.
It has to be downloaded directly from the DSi over a WiFi connection.
If you haven't downloaded the song, go download from Mp3raid and you have to make sure the music works by listening to it, if there's no music then the file is broken. If you have downloaded the song and it's not in the right format. Simply rename the song and then add a ".mp3" to it and then it will change. If it's in .av or other things etc, delete them and then add .mp3
Yes
It cannot be "downloaded", however and can be uploaded from your SD Card.
Should be pre-installed on system. If not, can be downloaded from Nintendo DSi Shop.