Staff can make and receive calls from their mobile App with all calls routing via the Surgery Phone system. No call charges are against the mobile call usage and staff identity is preserved as the Surgery phone number is shown opposed to the mobile number. The Users profile follows that of a normal desk phone User with call barring and other user features common. Should the User work across multiple devices e.g. deskphone, smartphone App or PC Softphone, the personal settings are common irrespective of device.