Is your cell phone a Samsung, possibly S8, DougH? If so then it should have come with a small adapter (USB Micro B to Micro C). Bosch supply a USB Charging Cable (Micro A - Micro B) with one end marked A and the other B. The end marked A (Micro B) plugs into the Intuvia display whilst the end marked B plugs into the small adapter which in turn plugs into the phone.