Simple calling - Most people, at first, will not recognize the difference between the GSM desktop phone and a standard landline phone. A simulated dial tone and automatic number dialing commonly associated with the standard desk phone are featured. Complete QWERTY keyboard - The character keyboard allows comfortable composition of SMS messages and easy and effective phonebook record maintenance and navigation. Large graphical LCD - The illuminated screen shows menus, numbers, text messages and other information using characters big enough to read from the average working distance.   One-touch dialing buttons - Six buttons speed up the dialing of frequently used numbers stored in twelve memories NEW!. Easily write down the name of the speed dial number under the clear plastic label. High quality speakerphone system - The speakerphone system features an advanced echo cancellation function and an automatic gain control for comfortable hands-free calling. Internet connectivity NEW! - The built-in GPRS modem can be simply accessed through the standard USB port. Analog line socket NEW! - A standard analog phone or a home phone exchange can be connected to the GDP-04 through the analog line socket (optional).   Other features - Simple access to incoming messages, missed calls or the phonebook via intuitive hot keys - Redial button and redial function for extended call history - Extended mobility with internal back-up battery - Comfortable use of advanced office call functions NEW!: hold, mute, conference call and call transfer