15assembling and preparing your mobile phoneassembling andpreparing yourmobile phoneGet started by assembling and setting upyour mobile phone for its first use.Install the SIM or USIM card andbatteryWhen you subscribe to a cellular service, you willreceive a Subscriber Identity Module, or SIM card,with subscription details, such as your personalidentification number (PIN) and optional services. Touse UMTS or HSDPA services, you can purchase aUniversal Subscriber Identity Module (USIM) card.To install the SIM or USIM card and battery,1. Remove the battery cover.If the phone is on, press and hold [ ] to turnit off.