Owner's Manual
Page 127
... by the battery. SMS (Short Message Service) Network service sending and receiving text messages to and from another subscriber, without the need to speak to unlock the phone when you are outside your home area (for example, when traveling). Patent Information This product was manufactured under one or more of the... the option to lock it automatically each time it switches on the back of the following US patents: 5276765, 5749067, 6061647 123 Phone Password Security code used to the correspondent.
... by the battery. SMS (Short Message Service) Network service sending and receiving text messages to and from another subscriber, without the need to speak to unlock the phone when you are outside your home area (for example, when traveling). Patent Information This product was manufactured under one or more of the... the option to lock it automatically each time it switches on the back of the following US patents: 5276765, 5749067, 6061647 123 Phone Password Security code used to the correspondent.