38• Ensure that both the sender and recipient are registered to the UMTSnetwork. If you invite someone to a sharing session and that person’sphone is turned off, or the person is not within UMTS network coverage,they do not know that you are sending an invitation. However, youreceive an error message that the recipient cannot accept the invitation.SettingsA person-to-person connection is also known as a session initiation protocol(SIP) connection. The SIP profile settings must be configured in your devicebefore you can use Video sharing.Ask your service provider for the SIP profile settings, and save them in yourdevice. Your service provider may send you the settings over the air.If you know a recipient’s SIP address, you can enter it on your contact cardfor that person. Select Menu > Contacts, a contact, and Options > Edit >Options > Add detail > SIP or Share view. Enter the SIP address in theformat sip:username@domainname (you can use an IP address instead of adomain name).Share live videoTo receive a sharing session, the recipient must install Video sharing andconfigure the required settings on their mobile device. You and the recipientmust both be registered to the service before you can start sharing.To receive share invitations, you must be registered to the service, have anactive UMTS connection, and be within the UMTS network coverage.1. When a voice call is active, select Options > Share video > Live video.2. The phone sends the invitation to the SIP address you have added to thecontact card of the recipient.