28 Copyright © 2009 Nokia. All rights reserved.C a l l f u n c t i o n s2 Scroll to the desired barring option, and selectOptions > Activate. To change the settings, you needthe barring password given by your service provider.Call barring and call diverting cannot be active at the sametime.When calls are barred, calls may be possible to certainofficial emergency numbers.NetworkSelect > Settings > Settings > Phone > Network andfrom the following:Network mode — to select which network to use (this isshown only if it is supported by the service provider). If youselect Dual mode, the device uses the GSM or UMTSnetwork automatically.Operator selection — to set the device to search for andautomatically select one of the available networks, selectAutomatic. To select the desired network manually from alist of networks, select Manual. The selected network musthave a roaming agreement with your home network.Cell info display (network service) — to set the device toindicate when it is used in a cellular network based onmicrocellular network (MCN) technology, and to activatecell info receptionVideo sharingUse video sharing to send live video from your mobiledevice to another compatible mobile device during a voicecall.Video sharing requirementsVideo sharing requires a 3G universal mobiletelecommunications system (UMTS) connection. Forinformation about network availability and the feesassociated with this application, contact your serviceprovider.To use video sharing you must do the following:• Ensure that your device is set up for person-to-personconnections.• Ensure that both the sender and recipient areregistered to the UMTS network.• Ensure you have an active UMTS connection and youare within UMTS network coverage. If you move awayfrom a UMTS network during the sharing session, thesharing session is discontinued, but your voice callcontinues.