Zte Z2321U User Manual And Safety Information page 66

Problem 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.
Cannot turn Battery power has been
your phone on depleted.
nano-SIM card nano-SIM card malfunction
error or damage.
nano-SIM card inserted
improperly.
Debris on the nano-SIM
card contacts.
Unable to nano-SIM card invalid.
connect to the
You are not within the
network
network's service area.
Poor signal.
PIN Code You have entered an
blocked incorrect PIN code three
consecutive times.
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.
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.
Contact your service provider. If the
service provider provides the nano-SIM
card's PUK code, use the PUK code to
unlock the nano-SIM card.
66