172GlossaryTo help you understand the main technical termsand abbreviations used in this booklet, and to takefull advantage of the features of your mobile phone,here are a few definitions:Active folderAbility to answer a call simply by opening thephone.Call forwardingAbility to reroute calls to another number.Call holdingAbility to put one call on standby while answering ormaking another call; you can then switch betweenthe two calls, as required.Call waitingInforms you that you have an incoming call whenyou are engaged on another call.Caller line identification services (Caller ID)Services allowing subscribers to view or block thetelephone numbers of callers.Dual bandAbility to handle any of the following types ofnetwork: GSM 850 and GSM 1900 MHz bands, forgreater call success and wider roaming.