Nokia Lumia 820 User Manual page 101

PUK
Security code (lock code, password)
(min. 4 digits)
IMEI
© 2013 Nokia. All rights reserved.
If you type in the code incorrectly three times in
a row, you need to unblock the code with the PUK
code.
This is required to unblock a PIN code.
If not supplied with your SIM card, contact your
network service provider.
This helps you protect your phone against
unauthorized use.
You can set your phone to ask for the lock code
that you define.
Keep the code secret and in a safe place,
separate from your phone.
If you forget the code and your phone is locked,
your phone will require service. Additional
charges may apply, and all the personal data in
your phone may be deleted.
For more information, contact Nokia Care or
your phone dealer.
This is used to identify valid phones in the
network. The number can also be used to block,
for example, stolen phones. You may also need
to give the number to Nokia Care services.
To view your IMEI number, dial *#06#.
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