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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
Possible causes
There is no SIM
SIM card
card in the phone
error
or it is inserted
incorrectly.
Signal is weak or
you are outside
the carrier
network.
No network
connection/
Dropped
network
Operator applied
new services.
To change a
security code, you
will need to
confirm the new
Codes do not
code by
match
re-entering it.
The two codes you
have entered do
not match.
Calls not
Dialing error.
available
New SIM card
22
Possible
corrective
measures
Make sure that
the SIM card is
correctly inserted.
Move toward a
window or into an
open area. Check
the network
operator coverage
map.
Check whether
the SIM card is
too old. If so,
change your SIM
card at your
network provider's
nearest branch.
Contact your
service provider.
If you forget
the code,
contact your
service
provider.
New network not
authorized.
Check for new
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