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Troubleshooting
This chapter lists some problems you might encounter when using your phone. Some
problems require you to call your service provider, but most are easy to fix yourself.
Message
There is no SIM
SIM or
or USIM card in
USIM card
the phone or it is
error
inserted incorrectly.
Signal is weak or
you are outside the
carrier network.
No network
connection/
Dropped
Operator applied
network
new services.
To change a
security code,
must need to
confirm the
Codes do
new code by
not match
re-entering it.
The two codes
you entered do not
match.
Troubleshooting
Possible causes
Possible corrective measures
Make sure that the SIM or USIM card
is correctly inserted.
Move toward a window or into
an open area. Check the network
operator coverage map.
Check whether the SIM or USIM card
is more than 6~12 months old. If so,
change your SIM or USIM card at your
network provider's nearest branch.
Contact your service provider.
If you forget the code, contact your
service provider.
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