Samsung SPHM500 Service Manual page 216

Sprint PCS Vision Connection Status and Indicators
Your phone's display lets you know the current status of your Sprint PCS
Vision connection through indicators which appear at the top of the screen.
The following symbols are used:
If no indicator appears, your phone does not have a current Sprint PCS
Vision or Sprint Power Vision connection. To launch a connection, see
"Launching a Sprint PCS Vision Connection" on page 190.
192 Section 3B: Sprint PCS Vision
Your Sprint PCS Vision connection is active (data is being
transferred); the transmit/receive symbol will blink to indicate
data transmission. Incoming voice calls go directly to voicemail;
outgoing voice calls can be made, but the Sprint PCS Vision
connection will terminate.
Your Sprint PCS Vision connection is dormant (no data is being
sent or received). Though not currently active, when dormant
the phone can restart an active connection quickly; voice calls
can be made and received.
Your phone is not currently able to access
Sprint PCS Vision service features.
Your phone is connected to a high-speed
Sprint Power Vision connection.
A high-speed Sprint Power Vision connection
is available.
The high-speed Sprint Power Vision connection
is dormant.
Your high-speed Sprint Power Vision connection
is active.