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network
transmitting
tower will use up
a large of power
and shorten the
standby time
Fail to turn on
The
the mobile
battery is used
up
SIM card error
SIM
damaged
SIM is installed
incorrectly。
There
feculency on the
metal surface of
SIM card
Fail
to
Invalid SIM card
connect
the
network
Outside
coverage
GSM service
the
Move a place with
strong signal or
power
phone.
power
of
Check the battery
power capacity or
recharge it
card
is
Contact with your
supplier
Check
SIM
installed correctly
is
Wipe
the
touch part of SIM
card
with
cloth
Contact with your
supplier
the
Consult with the
of
network operator
156
off
the
whether
card
is
metal
clean
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