Sony V600 User Manual

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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 a
ppears, 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.