Sony V600 - Manual (Page 127)

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127
7.7 SIM card lock
The SIM card lock protects your subscription, but not your phone itself, from unauthorized
use. If you change SIM cards, your phone still works with the new SIM card.
Most SIM cards are locked at the time of purchase. If the SIM card lock is on, you have
to enter a PIN (Personal Identification Number) every time you turn on your phone.
If you enter your PIN incorrectly three times in a row, the SIM card is blocked. This
is indicated by the message PIN blocked. To unblock it, you need to enter your PUK
(Personal Unblocking Key). Your PIN and PUK are supplied by your network operator.
You can edit your PIN and select a new four- to eight-digit PIN.
Note:
If the message Codes do not match appears when you edit your PIN, you entered
the new PIN incorrectly. If the message Wrong PIN appears, followed by Old PIN:,
you entered your old PIN incorrectly.
To unblock your SIM card
1. When PIN blocked is displayed, enter your PUK } OK.
2. Enter a new four- to eight-digit PIN
} OK.
3. Re-enter the new PIN to confirm
} OK.