Sony Ericsson Z500a User Guide - Page 81

More features Calculator The phone has a calculator, which can add, subtract, divide and multiply. To use the calculator } Organizer } Calculator. • Press or to select ÷ x - + . % = • Press to delete the figure. • Press to enter a decimal point. SIM card lock The SIM card lock protects your subscription, but not your phone itself, from unauthorized use. If you change SIM cards, the phone still works with the new SIM card. Some SIM cards are locked at the time of purchase. If the SIM card lock is on, you have to enter a PIN (Personal Identity 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 service provider. 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. To edit your PIN } Settings } the General tab } Locks } SIM Lock } Change PIN. To turn the SIM card lock on or off 1 } Settings } the General tab } Locks } SIM Lock } Protection and select On or Off. 2 Enter your PIN } OK. If the message Codes do not match. appears, you entered the new PIN incorrectly. If the message Wrong PIN. appears, followed by Old PIN:, you entered your old PIN incorrectly. Phone lock The phone lock protects the phone against unauthorized use if it is stolen and the SIM card is exchanged. It is not on when you buy the phone. You can change the phone lock code (0000) to any four- to eight-digit personal code. 80 This is the Internet version of the user's guide. © Print only for private use.