A 4G and/or 5G signal communication unit is able to be attached to a glazing unit that includes housing with at least side parts and a cover. A communication device is fixed inside the housing and is surrounded by the side parts and the cover. The 4G and/or 5G signal communication device has at least one antenna. The housing includes a matching element. A communication system includes a glazing unit, at least the 4G and/or 5G signal communication unit and a provider fixed station or active or passive repeater, which is placed at least at 1 m outside from the glazing unit. The 4G and/or 5G signal communication unit is fixed to the glazing unit at the opposite side from the provider fixed station or active or passive repeater.