Siemens U15 User Manual Page 146

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Security
Unblock the SIM Card PIN Code
If you enter an incorrect SIM card PIN code three times in a row,
your SIM card is disabled and your phone displays the message
SIM Blocked
. You need to enter a PIN unblocking key (PUK)
code, which you can obtain from your service provider.
Note: In the following key sequence, each key press must occur
within two seconds of the previous keypress.
Caution: If the unblocking attempt is tried unsuccessfully 10
times, the SIM card is permanently disabled and your phone
displays the message
SIM Disabled
.
Note: You can open the PIN2 unblocking editor by entering
**052*. Use the PUK2 code in place of the
PUK code in the above procedure.
Press To
1 * * 0 5 *
open the PIN
unblocking editor
Your phone prompts
you to enter the
PIN
Unblock Sequence:
2 PUK code +
OK
(+)
+ new PIN code +
OK
(+)
+ new PIN code +
OK
(+)
unblock the SIM
card PIN features
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