Glossary182Dual BandAbility to operate with both DCS (1900 MHz) and GSM (850MHz) networks. The phone automatically uses the networkwith strongest signal and even switches networks during acall within the same operator’s network.EMS (Enhanced Message Service)An adaptation of the Short Message Service (SMS) thatallows you to send and receive ring tones and serviceprovider’s logo, as well as combinations of simple media toand from EMS-compliant handsets. Because EMS is basedon SMS, it can use SMS centres the same way that SMSdoes. EMS works on all Global System for Mobilecommunications (GSM) networks. EMS senders can usetext, melodies, pictures, sounds, and animations toenhance the expressive power of messages that are limitedby the display constraints of mobile devices.GSM (Global System for Mobile Communication)International standard for cellular communication,guaranteeing compatibility between the various networkoperators. GSM covers most European countries and manyother parts of the world.