The Sansa's have different features for different countries/regions. E.g. the Japanese radio frequencies ranging from 76 to 90 MHz are partly used for Police radio and thus it is not allowed to tune to these forbidden frequencies.
SanDisk achieved this by removing the Japan region from the Radio region selector. In European models of the FUZE you will only find "USA" and "World" as options in this setting.
Another example is the missing "Hebrew" language for "Arabic" regions and vice-versa.
Now the exciting part: If you download firmware files of the same version for different regions (e.g. from daniel.haxx.se) you'll notice that ALL firmware files have the same checksum. So how does the player decide which features to enable and which to leave disabled?
The Sansa Updater of SanDisk seems to download a new firmware and put it into the root of the player named as
This way the firmware gets updated without changing any feature-bit. An European player stays an European player.
BUT, if you name the file
fuzpA.bin, the player will set the feature bits for the USA and thus the Japan radio region
will become available. If you have the European version without FM radio, you might want to try naming the file
to get the FM radio feature. From what I've read, it is only disabled by firmware with the hardware still built-in.
To get most of your player, you should name the firmware file
fuzpT.bin so that all feature bits get set.
||X||X||X||Americas / World|
||X||Europe (no FM radio)|
||Israel (no FM radio)|
||Arabic (no FM radio)|
||X||X||South America? (no FM)|
||X||X||X||X||X||X||TEST mode firmware|
Description of the flags (taken from the rockbox forums)