HTC splashscreen

A HTC splashscreen is an image used on HTC Android-based phones on startup. It is in a raster graphic format known as "NB" (apparently unrelated to the Mathematica notebook format). While a BMP-to-NB converter program exists which saves the image files in a .nb extension, the HTC actually uses them with a .img extension, contained within a ZIP file (named ) along with a   file giving some metadata.

android-info.txt contents
This is a sample android-info-txt (downloadable here); apparently you have to duplicate this exactly for the splashscreen to work:

hbootpreupdate:13 modelid: PH3910000 cidnum: CWS__001 mainver: 3.26.502.56 hbootpreupdate:12 DelCache:1

Sample files

 * Stock version of HTC splashscreen (Dead, no known archive)

Links

 * How to change your HTC splash screen
 * nbimg conversion utility