HTC PG06100 User Manual page 26

Status Bar – Notification Icons
Compass needs orientation
Uploading data (animated)
Downloading data (animated)
Waiting to upload
Content downloaded
Device connected to computer via USB
cable
Storage card is safe to remove or storage
card is being prepared
No storage card installed on the device.
New tweet
Updates available for an application
downloaded from Android Market
14 2A. Device Basics
Status Bar – Device Status Icons
Signal Strength 
(More bars = stronger signal)
No Service
Device is "roaming" off the network
3G data service (EVDO) available (when
active, icon animated)
1xRTT network available (when active, icon
animated)
Data service is currently unavailable