7Consider installing antivirus and other security software on your device and any connectedcomputer.Your device may have preinstalled bookmarks and links for third-party internet sites. Youmay also access other third-party sites through your device. Third-party sites are notaffiliated with Nokia, and Nokia does not endorse or assume liability for them. If you chooseto access such sites, you should take precautions for security or contentYour device can only support one antivirus application. Having more than oneapplication with antivirus functionality could affect performance and operation orcause the device to stop functioning.Warning: To use any features in this device, other than the alarm clock, the devicemust be switched on. Do not switch the device on when wireless device use maycause interference or danger.When connecting to any other device, read its user guide for detailed safety instructions. Donot connect incompatible products.Remember to make back-up copies or keep a written record of all important informationstored in your device.■ Network servicesTo use the device you must have service from a wireless service provider. Many of thefeatures require special network features. These features are not available on all networks;other networks may require that you make specific arrangements with AT&T before you canuse the network services. AT&T can give you instructions and explain what charges willapply. Some networks may have limitations that affect how you can use network services.For instance, some networks may not support all language-dependent characters andservices.AT&T may have requested that certain features be disabled or not activated in your device. Ifso, these features will not appear on your device menu. Your device may also have a specialconfiguration such as changes in menu names, menu order, and icons. Contact AT&T formore information.This device supports WAP 2.0 protocols (HTTP and SSL) that run on TCP/IP protocols. Somefeatures of this device, such as web browsing, e-mail, video share, GPS navigation, instantmessaging, and multimedia messaging, require network support for these technologies.■ Shared memoryThe following features in this device may share memory: tones, graphics, contacts, textmessages, multimedia, and instant messages, e-mail, calendar, To-Do Notes, JavaTM games,applications, and the Note application. Use of one or more of these features may reduce thememory available for the remaining features sharing memory. Your device may display amessage that the memory is full when you try to use a shared memory feature. In this case,delete some of the information or entries stored in the shared memory features beforecontinuing.