The Nokia 616 Car Kit comes with three operational modes depending on your mobile phone capabilities and personal preferences: SIM Access Mode: functions as a car phone that accesses the SIM card of a compatible mobile phone using Bluetooth SIM Access Profile Handsfree Mode: functions as a car kit that accesses a compatible mobile phone using the Bluetooth Handsfree Profile Car SIM Mode: functions as a standalone car phone with a separate SIM card inserted in the SIM card reader in the Nokia 616 Car Kit Additionally, you can conveniently switch between your compatible mobile phone and car kit when entering or leaving your car, simply by turning the ignition key. The Nokia 616 Car Kit requires professional installation.   Additional Technical Details:   Convenient Information Management The Nokia 616 Car Kit is designed to accommodate the particular needs of the user. You can handle calls and messages using a separate display and input device installed at a convenient place in the vehicle. The large font size of the display makes the text easier to read. You can access the main phone features with a small input device that can be installed at within easy reach. Voice dialing is also simple - just press the dedicated voice key and speak the desired name. Excellent audio quality and an external antenna connection further enhance your calling and messaging experience in the vehicle environment. And if two people share the car, both can easily access their personal user profiles including contacts, personal voice tags and specified car kit settings.   Broad Compatibility The Nokia 616 Car Kit offers broader compatibility, since it supports several profiles of the Bluetooth standard. In addition to the SIM Access Profile, it supports the Bluetooth Handsfree Profile, which is standard in all Nokia mobile phones with built-in Bluetooth wireless technology.* * Bluetooth Handsfree Profile 1.0 is not supported by the Nokia 7650.   Phonebook and User Profiles Memory for two user data profiles including contacts, voice tags, personal settings* Up to 1000 contacts per user data profile, up to 5 numbers per contact Contacts download from compatible mobile phone supporting Bluetooth wireless technology *Only if used in SIM Access mode or with Car SIM card Audio Features Handsfree with excellent audio quality Option to use compatible existing car loudspeakers Support for car radio mute One touch switchover between car handsfree and compatible wireless headset supporting Bluetooth wireless technology Ringing tone and speaker volume adjustment with Navi™ wheel Switch between normal, silent, and standby modes Voice Features* User-dependent voice dialing** Memory for up to 12 voice tags per user profile 3 user-dependent predefined voice commands per user profile:     - Replay voice memos     - Download contacts     - Connect wireless headset Voice recording also during a call:     - Up to ten voice recordings, totalling up to 5 min. of       recording time     - Easy replay of voice recordings *Only if used in SIM Access mode or with Car SIM card **Possible in Handsfree mode if mobile phone supports voice dialling Call Features Call initiation:     - Voice dialing with name tags     - From phonebook     - From call registers     - Number dialing Accept / reject an incoming call Closed user group Fixed dialing number Messaging Features Short message handling*     - Read SMS*     - Voice call back to SMS sender*     - SMS forward to mobile phone via Bluetooth technology*     - Send predefined templates*     - Store SMS as template*     - Entering SMS text via the optional Nokia Car       Handset HSU-4*     - Business card and calendar card upload to mobile phone       via SMS or Bluetooth wireless technology* *Only available in Bluetooth SIM Access Profile mode or if SIM Card is inserted in the car phone Interfaces supported GSM 900/1800 antenna* Bluetooth profiles (according to specification 1.0)     - SIM access (SIM)     - Handsfree (HFP)     - Object Push (OPP)     - Dialup network (DUN)     - Fax     - Serial Port     - Headset *Only if used in SIM Access mode or with Car SIM card GSM Data Capabilities* Modem and fax function via Bluetooth wireless technology interface GSM data transfer: HSCSD up to 43,2 kbps GPRS up to 40,2 kbps *Only if used in SIM Access mode or with Car SIM card