What is the instant messaging (IM) service on my device?
With instant messaging (IM) (network service) you can send short, simple text messages to online users. You have to subscribe to a service and register with the IM service you want to use. For more information about signing up for IM services, contact your service provider. To set the required settings for the IM service, select Menu > Messaging > IMs > Connection settings. The icons and texts on the display may vary, depending on the IM service.