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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?
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?
Enter the PUK code supplied with the
SIM card to unlock or contact your
network provider.
1. SIM card is dirty, clean it.
2. Reinstall the SIM card.
3. SIM card is damaged, replaced it.