Zte VFD 512 User Manual page 71

Problem
nano-SIM
card error
Unable to
connect to
the network
Cannot
answer
incoming
calls
Cannot make
outgoing
calls
PIN Code
blocked
Possible causes
The nano-SIM card
malfunctions or is
damaged.
The nano-SIM card is
inserted improperly.
There is debris on the
nano-SIM card contacts.
The nano-SIM card is
invalid.
You are not within the
network's service area.
The signal is poor.
You have activated the Call
barring feature.
You have activated the Call
barring feature.
You have activated the
Fixed dialling numbers
feature.
You have entered an
incorrect PIN code three
consecutive times.
71
Possible solution
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.
Disable this
feature.
Disable this
feature.
Disable this
feature.
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.