here we have small hack for mobile phones to hide the files either in the external or internal memory
- create any file with any name and save with .jar file extension.
- create another file with same name with .jad as file extension.
- once you create the .jad file very soon it disappears so rename the first created .jar file and save it.
- now the .jad file is visible to us.
- what are the files you want to hide just place it in the .jad file.
- now rename .jar to its original file name
this hack is tested on the nokia mobiles and its working.