Zte BLADE A512 User Manual page 145

Problem
Cannot
make
outgoing
calls
PIN Code
blocked
Phone
crashes,
reboots,
freeze, or
cannot be
powered on
Possible causes
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.
Some third-party
software is not
compatible with your
phone.
Possible solution
Disable this feature. See
Bar Certain
Disable this feature. See
Use Fixed Dialling
Numbers.
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.
Uninstall the software
that may cause the
problem.
Upgrade the phone
software.
Reset the phone to
factory status.
145
Calls.