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No
network
service
SIM
card
can't use
Can't
send
SMS
Can't call or
can't answer
the phone
PIN error
3. When couldn't get a
signal, phone will continue to
launch to look for the base
station, which will use a lot
of
battery,
standby time short.
1.
The SIM card is invalid
2.
Not in a service area
3.
Weak signal
1.
SIM card is damaged
2.SIM card is not installed
properly.
3. SIM card contacts is not
clean
Not open this service or no
input text message center
number
Call limit has set
Input wrong PIN code three
times
and
cause
25
Move to area of good
signals
or shutdown
for the moment
Contact with network
operators
Check
the
operator's service area
Move to the window or
choose another service
network
Back
to
operators for inspecting
To
properly
the SIM card
wipe the contacts with
a clean cloth
contact with network
operators, and set the
SMS center number
Close call limit
Contact with network
operators
network
network
installed
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