Palm Treo 650 Using Manual page 39

You can monitor the status of several items using icons at the top of the
Phone screen:
Network name Displays the name of your wireless service provider when your
phone is on and you are in a coverage area. If you are outside your
wireless service provider's coverage area, No Service or Roaming
appears instead. No Service means that there is no coverage at all
and Roaming means that another wireless service provider's
network is available. When you turn off your phone, Phone Off
appears.
Appears when you are outside your wireless service provider's
coverage area and roaming on another wireless service provider's
network. This icon may flash if the provider is not on the your
wireless service provider preferred roaming list.
Wireless mode is on but your phone is not connected to any data
network. The bars display the signal strength. The stronger the
signal, the more bars appear. If you are outside a coverage area, no
bars appear.
Your phone is connected to a data network. When the arrows above
the signal bars are gray, you are in standby mode and you can
receive calls. When the arrows are green, a data session is active
(for example, when you are browsing the web) and you cannot
receive calls.
Your phone is in a coverage area where data services are available,
but it does not indicate whether you are connected to a data
network. This icon appears in the Main View of the Phone
application (near the top of the screen).
Appears when you have new voicemail messages. You can select
this icon to retrieve your messages.
If you have multiple alerts,
the Alert screen displays all
your pending alerts. Select
an item's description to
jump to that item, or check
the box to deselect that
item. To view all your
pending alerts from any
screen on your phone,
press and hold Center.
Phone overview :: 37