Zte Z557 User Manual page 128

Problem
Cannot turn your
phone on
nano-SIM card
error
Cannot answer
incoming calls
Cannot make
outgoing calls
Unable to
connect to the
network
Possible causes
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.
The nano-SIM card has
malfunctioned or is
damaged.
The nano-SIM card is
inserted improperly.
Debris is on the nano-SIM
card contacts.
You have activated the Call
blocking feature.
You have activated the
Fixed Dialing Numbers
feature.
The nano-SIM card is
invalid.
You are not within the
network's service area.
Possible solution
Change your location to one
where the network is
accessible, or temporarily turn
off your phone.
Recharge the phone's battery.
Take the nano-SIM card to
your service provider for
testing.
Insert the nano-SIM card
properly.
Use a soft, dry cloth to clean
the nano-SIM card contacts.
Disable this feature. See
Call Blocking.
Disable this feature. See
Fixed Dialing
Contact your service provider.
Check the service area with
your service provider.
128
Set
Use
Numbers.