Download the CLEARLink app here to easily update the firmware wirelessly (OTA = Over The Air) via your smartphone. As soon as a newer version is available, this is indicated by a red dot next to the "Update firmware" button and the button is activated. The update takes place in the background after the start, even during use. With Android smartphones, the firmware update takes just a few minutes. With the iPhone, it can take up to over an hour, which is due to the limitations of iOS.