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Cannot call out
1.
Is the SIM card registered to the
network?
2.
Is call barring enabled?
3.
Are calls prohibited due to unpaid
call charges?
4.
Have you enabled the FDN
function?
5.
Have you selected line 2 although
your network provider doesn't
provide this service?
Cannot call in
1.
Is the SIM card registered to the
network?
2.
Are incoming calls prohibited due
to unpaid call charges?
3.
Is call forwarding enabled?
4.
Is call barring enabled?
PIN locked
Enter the PUK code supplied with the
SIM card to unlock or contact your
network provider.
SIM error
1.
SIM card is dirty, clean it.
2.
Reinstall the SIM card.
3.
SIM card is damaged, replaced it.