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69Troubleshooting
Codes do not match
Codes that you have entered do not
match. When you want to change
a security code, for example your PIN,
you have to confirm the new code.
See SIM card lock on page 64.
No netw. coverage
Your phone is in flight mode. See
Flight mode on page 6.
Your phone is not receiving any network
signal, or the received signal is too
weak. Contact your network operator
and make sure that the network has
coverage where you are.
The SIM card is not working properly.
Insert your SIM card in another phone.
If this works, it is probably your phone
that is causing the problem. Please
contact the nearest Sony Ericsson
service location.
Emerg. calls only
You are within range of a network,
but you are not allowed to use it.
However, in an emergency, some
network operators allow you to call the
international emergency number 112.
See Emergency calls on page 17.
PUK blocked. Contact operator.
You entered your personal unblocking
key code (PUK) incorrectly 10 times in
a row.
Charging, alien battery
The battery that you are using is not
a Sony Ericsson-approved battery.
See Battery on page 73.