[ 68 ]Note: If you make a mistake while entering the code, Code Error appears.Start again at step 2 and be careful to enter the correct code. If youenter the wrong code three times in a row, the PIN code is blocked.To unblock the PIN code, see “PUK codes” on page 68.Set SIM card securityThis feature sets your phone to ask for the PIN code each time the phoneis switched on and prevents unauthorized use of your phone.1 Press Menu 4 6 1.2 Enter the PIN code supplied by your service provider, and press OK.3 Press (up or down) to highlight On and press OK.To turn off this feature, repeat steps 1 through 3 above, but highlight Offin step 3.Note: If you enter the wrong PIN or PIN2 code three times in a row, theSIM card is automatically blocked or you cannot activate thefunction. See "PUK codes" below to unblock the codes.PUK codesThe PUK (Personal Unblocking Key) and PUK2 codes are 4- to 8-digit codesthat also usually come from your service provider along with the SIM card.The PUK code unblocks a blocked PIN code, and the PUK2 code unblocksa blocked PIN2 code.Unblock a PIN code1 Press Menu 4 6 5, then press Select.Change PIN code appears.2 To unblock the PIN2 code, press (down) to select Change PIN2 code.3 Press Select.PIN code blocked appears.4 Enter the PUK code, then press OK.