HTC HD2 User Manual page 39

You can also personalize the Home screen with an animated or picture
wallpaper (by tapping Menu > Home Wallpaper), rearrange the tabs,
as well as add quick links to people who matter most to you, your
favorite websites, and applications.
For more information about using the Home screen, see Chapter 3.
1. Status Icons
Status icons are displayed in the title bar at the top of the screen.
The following are some of the status icons that you may see on your
phone.
Missed call
Battery charging
Full battery
Very low battery
Sound on
Silent
Vibrate
Maximum signal strength
Chapter 1 Getting Started 
New email
HSPA available
HSPA connected
WCDMA/UMTS available
WCDMA/UMTS connected
EDGE available
EDGE connected
GPRS available