Select the user certificate you want to use, and enter the signing PIN. The digital signature icon disappears, and the service maydisplay a confirmation of your purchase.18. SIM servicesYour SIM card may provide additional services. You can access this menu only if it is supported by your SIM card. The name andcontents of the menu depend on the available services.For availability and information on using SIM card services, contact your SIM card vendor. This may be the service provider orother vendor.To set the phone to show you the confirmation messages sent between your phone and the network when you are using theSIM services, select Menu > Settings > Phone > Confirm SIM actions > Yes.Accessing these services may involve sending messages or making a phone call for which you may be charged.19. PC connectivitySend and receive e-mail, and access the internet when your device is connected to a compatible PC through a Bluetooth or adata cable connection. Use your device with a variety of PC connectivity and data communications applications.Nokia PC SuiteWith Nokia PC Suite you can synchronize contacts, calendar, notes, and to-do notes between your device and the compatible PCor a remote internet server (network service). You may find more information and PC Suite on the Nokia website. See "Nokiasupport," p. 8.Packet data, HSCSD, and CSDWith your phone, you can use the packet data, high-speed circuit switched data (HSCSD), and circuit switched data (CSD, GSMdata) data services. For availability and subscription to data services, contact your network operator or service provider.The use of HSCSD services consumes the battery faster than normal voice or data calls.BluetoothUse Bluetooth technology to connect your compatible laptop to the internet. Your phone must have activated a service providerthat supports internet access, and your PC has to support Bluetooth PAN (personal area network). After connecting to the networkaccess point (NAP) service of the phone and pairing with your PC, your phone automatically opens a packet data connection tothe internet. PC Suite software installation is not necessary when using the NAP service of the phone. See "Bluetooth wirelesstechnology," p. 25.Data communication applicationsFor information on using a data communication application, refer to the documentation provided with it.Making or answering phone calls during a computer connection is not recommended as it might disrupt the operation.For better performance during data calls, place the device on a stationary surface with the keypad facing downward. Do notmove the device during a data call. For example, do not hold the device during a data call.20. Genuine enhancementsWarning: Use only batteries, chargers, and enhancements approved by Nokia for use with this particular model. Theuse of any other types may invalidate any approval or warranty, and may be dangerous.A new extensive range of enhancements is available for your device. Select the enhancements thataccommodate your specific communication needs.S I M s e r v i c e s© 2007 Nokia. All rights reserved. 40