Zte Z852 User Manual page 165

Problem
Cannot
make
outgoing
calls
PIN Code
blocked
Phone
crashes,
reboots,
freeze, or
cannot be
powered on
FCC Regulations:
This mobile phone complies with part 15 of the FCC
Rules. Operation is subject to the following two
conditions: (1) This device may not cause harmful
Possible causes
You have activated the
Fixed dialing 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
Use Fixed Dialing
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.
165