A retaining device for a mobile device having an accommodating module, into which the device can be inserted and on which a guide, support, and/or positioner for the device and a connector for electrically contacting the communication device are provided, and having a rotation module, on which the accommodating module is retained. The accommodating module can be rotated together with the rotation module about a first pivot axis from and to a first operating position and a second operating position. A housing is provided, in which the accommodating module and the rotation module are provided at least in some sections and on which the rotation module is retained. The accommodating module can be moved from an accommodating position, in which the device can be inserted into the accommodating module, to the first operating position and/or to the second operating position by rotating the accommodating module about a second pivot axis.