HTC splashscreen

File Format
Name	HTC splashscreen
Ontology	Electronic File Formats Graphics HTC splashscreen
Extension(s)	.nb, .img

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 PH39IMG.zip) along with a android-info.txt 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