35
PIN appears
error
Input invalid PIN
code for three
times.
Please
contact
your
network
operator.
Problem
Reason
Solution
Can’t connect
to network
SIM card is
invalid.
Please
contact
your
network
operator.
Beyond
GSM
service area.
Ask
network
operator
for
service area.
Weak signal.
Move to a place
with strong signal
and try again.
Can’t charge
Battery
or
charger
is
damaged.
Change
the
battery or charger.
Charge in the
environment with
extreme
temperature.
Change it in the
normal charging
environment.
