3 cellphone calls and messaging, Cellphone calls and messaging – ZyXEL Communications V660 User Manual
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Chapter 23 Troubleshooting
V660 User’s Guide
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I am asked for a ‘PIN’, ‘PIN2’, ‘PUK’ or ‘PUK2’.
The SIM PIN or PIN2 function is on. The PIN is a code you must enter to access SIM card
calling functions. The PIN2 is a different code used to protect certain specific SIM card
functions. Enter the SIM PIN or PIN2 and press Done.
• If you know the SIM PIN or PIN2 and want to turn it off, see
• If you know the SIM PIN, but it does not unlock the SIM card when you enter it, the SIM
card may have become locked. This happens when the PIN is entered wrongly multiple
times consecutively. You must enter the PUK (Personal Unblocking Key) to unlock the
SIM card. Contact the cellphone service provider who supplied your SIM card if you do
not know the PUK.
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It is possible to lock the SIM card permanently. This happens if you enter the
wrong PUK multiple times in succession. If the SIM card is permanently
locked, you cannot access data stored on it.
If you do not know the SIM PIN, there is no way for you to use cellphone functions. Contact
the cellphone service provider who supplied your SIM card.
23.3 Cellphone Calls and Messaging
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I cannot make or receive cellphone calls, or send or receive SMS (text)
messages.
• You may be in an area with poor or nonexistent reception. Check the cell signal indicator
on the LCD screen. Moving outdoors, to a higher position or nearer to a cell mast’s likely
location can help improve poor reception.
• You need to have a SIM card installed in the V660 to make cellphone calls (see your
Quick Start Guide). If you have installed a SIM card, it may be wrongly inserted or faulty.
Check if the “missing SIM” or “faulty SIM” icon displays on the LCD screen. If so, turn
the V660 off, remove the battery cover and the battery, and check the SIM card. If there is
any dirt or corrosion on the contacts (the metal parts) of the SIM card or the V660, remove
it carefully. Reinsert the SIM card and battery, and slide the battery cover back on. Turn
the V660 on.