Zte Concord II - Phone crashes, reboots, freeze, or cannot be powered on

148
Problem
Possible causes
Possible solution
PIN Code
blocked
You have entered an
incorrect PIN code three
consecutive times.
Contact your service
provider. If the service
provider provides the
SIM card’s PUK code,
use the PUK code to
unlock the SIM card.
Unable to
enter
information
into the
phonebook
The phonebook’s
memory is already full.
Delete unnecessary
data from the contacts.
Phone
crashes,
reboots,
freeze, or
cannot be
powered on
Some third-party
software is not
compatible with your
phone.
Reset the phone to
factory status.
Enter safety mode and
uninstall the software
that may cause the
problem.
Upgrade the phone
software.