Certified radio modules enabling the radio data transmission in numerous radio frequency bands and radio standards. The radio modules are designed in a way that the mode of operation can be configured via external host micro controller to meet best the requirements of the underlying application. Nevertheless, there are still cases where an adoption or complete change of the firmware is necessary to enable standalone operation, provide new interfaces or simply to optimize the behaviour of the underlying application. Due to the change in firmware the radio certification of the adopted radio module must be verified again. This application note describes in which cases the certification of an adapted radio module can be created on base of the certification of the Würth Elektronik eiSos standard product.