These type of fonts are popular in embedded devices, like phones. I managed to find guides from Symbian and MSDN documentation sites, but what I want is to open an .ltt file that I downloaded (the original typeface of my SE W508). This is possible? A software to do this exists?
Quickly looking around, I found this which is probably the same LTT font format you are asking about. ( https://developer.brewmp.com/resources/tech-guides/fonts-features-technology-guide/creating-and-using-fonts-brew-mp-applications/creating-custom-linkedtruety ) which claims:
Note: Linked fonts are a proprietary font format of Monotype Imaging. For more information, please refer to http://www.monotypeimaging.com/markets/LinkedFonts.aspx.
And at that location I see this:
Font linking allows developers to remove data redundancy and more flexibly manage the font memory footprint of consumer electronic devices. Through font linking, a grouping of fonts can be treated as a single font, without having to merge multiple font files.
Which implies that the font files are not part of the LTT file format (i.e. the file is like a packing list, instructing applications which parts of what fonts to use when). The font files may be elsewhere on the device, possibly in the same folder as the LTT file (or in an archive/container format).