Recently I needed to know, which chars (glyphs) are supported by a windows mobile font. I looked around for a charmap tool like we have on Windows Desktop PCs and was unable to find one. So I started this little tool: CharmapCF.
As you can see, you get a simple charmap and can verify what glyphs are supported and which not (square rectangle).
CharmapCF supports only UCS-2, UTF-16 as used by Microsoft’s Encoding.Unicode class. So it also only supports the Unicode Basic Multilanguage Plane (BMP).