Do you want to use a free logo for your mobile (cell) phone? Free as in freedom? Here are some links to logos published under a free license, e.g. Creative Commons, GPL. Not much yet but I hope it works as a start. If you know of a missing logo please let me know.
/usr/bin/obexftp -b -p debian-120x160.pngThe phone obligingly offered to use it, as wallpaper."
Nokia Logo Editor(http://www.mimuw.edu.pl/~lczajka/nle/) allows you to edit nol and ngg files on a Nokia phone.
The Nokia Logo Converter for Linux(http://stalmp3box.sourceforge.net/kylixprojects/main.html) is a small program that is capable of converting most Nokia Logo Files (*.nlm, *.nol, *.ngg) into Bitmap and vice-versa, allowing you this way to use any Bitmap you drew or copied from somewhere as a logo for your Nokia Mobile Phone or to browse your collection of Nokia Logo files. It handles both formats of Logos (Operator and Picture SMS) and has an integrated file browser showing you every Logo or Bitmap in a directory while you scroll in the file box.
This online tool scales picture files especially for Siemens S55 mobile phones(http://www.shredzone.net/s55logo.php) , honoring its built in color palette. By using some technical magic, this tool will deliver visibly sharper pictures, compared to standard scaling methods.