Flexible sleeve with at least one communication unit for a controlled activation of communication services of electronic devices, e.g. computers, smartphones, tablets, network components, network storage (NAS) or the like, wherein the flexible sleeve at least partially encloses at least one electronic device or can be integrated into it and the at least one communication unit is programmed in such a way that it analyses a hardware and software of the at least one electronic device and, depending thereon, activates one or more modules or functionalities of the at least one electronic device or switches off.