![Nokia 640 User Manual Download Page 12](http://html.mh-extra.com/html/nokia/640/640_user-manual_253391012.webp)
©
2001 Nokia Mobile Phones. All rights reserved.
11
The display indicators
The indicators described below are shown when the phone is in
standby mode and ready for use, with no characters entered by the
user.
Indicates the country where the phone is currently
being used.
and bar
Shows the signal strength of the cellular network at
your current location. The higher the bar, the stronger
the signal.
and bar
Shows the battery charge level. The higher the bar, the
more power in the battery.
Service symbol. When this symbol appears on the
display you are in the network service area and you may
be able to make a call.
Other indicators appear on the display in different functions. These
include:
Roam indicator. Comes on when the NMT 450 network
cannot transmit calls to/from your phone. To reregister
the phone to the system, press
OK
when message
Roam
appears on the display, or try to make a call.
Message indicator. When this is displayed continuously,
you have received a text message. When it flashes there
is no more space for new messages. Use the
Erase
function in the
Inbox
or
Outbox
to make some space.