A circuit card assembly is provided. A modem device for realizing this technique comprises a first mobile platform module adapted to support network access via a first radio access technology and comprising a first data interface towards the external device, as well as a second mobile platform module adapted to support network access via at least one second RAT and comprising a second data interface towards the external device. The rotatable base is base has a bottom portion adapted to contact the floor, a top portion rotatably connected to the bottom portion, and a bearing assembly supporting the top portion on said bottom portion.