42
Troubleshooting
This chapter lists some problems you might encounter while using your phone.
Some problems require you to call your service provider, but most are easy to
fix by yourself.
Message
Possible causes
Possible corrective measures
SIM card
error
There is no SIM card in
the phone or it is
inserted incorrectly.
Make sure that the SIM card is
correctly inserted.
No network
connection/
Dropped
network
Signal is weak or you
are outside the carrier
network.
Move toward a window or into an
open area. Check the network
operator coverage map.
Operator applied new
services.
Check whether the SIM card is too
old. If so, replace your SIM card at the
nearest network provider's branch.
Contact your service provider.
Codes do
not match
To change a security
code, you will need to
confirm the new code
by re-entering it.
If you forget the code, contact your
service provider.
The two codes you