Zte F953 User Manual page 43

Shortened standby time
You cannot switch your
phone on.
(U)SIM card error
Unable to connect to the
network.
You cannot answer
incoming calls.
You cannot make
outgoing calls.
• The standby time is related to
your service provider system
configuration. The same phone
used with different service
providers' systems will not
provide exactly the same length of
standby time.
• The battery is depleted. In
high-temperature environments,
battery life will be shortened.
• If you are not able to connect to
the network, the phone will
continue to send out signals as it
attempts to locate a base station.
Doing so consumes battery power
and will consequently shorten
standby time.
• Battery power has been depleted.
• SIM card malfunction or
damage.
• SIM card inserted improperly.
• Debris on the SIM card contacts.
•SIM card invalid.
• You are not within the network's
service area.
• Poor signal.
• You have activated the Call
Barring feature.
• You have activated the Call
Barring feature.
Confidential and Proprietary Information of ZTE CORPORATION 43
If you are located in an area where signaling is
weak, temporarily switch off the phone.
Use a new battery.
Change your location to one where the network is
accessible, or temporarily turn off your phone.
Recharge the phone's battery.
Take the SIM card to your service provider for
testing.
Insert the SIM card properly.
Use a soft, dry cloth to clean the SIM card contacts.
Contact your service provider.
Check the service area with your service provider.
Move to an open space, or if you are inside a
building, move closer to a window.
Go to Settings > Call > Call Barring, and then
select Cancel all call barring.
Go to Settings > Call > Call Barring, and then
select Cancel all call barring.