Hi, I have purchased a Vislone android headunit (link below). First problem although it states AM radio there isn't option on pre-installed app. I don't want to return unit so with the lack of offline AM radio apps I purchased a DAB+ usb dongle and installed Dab-z app but not it's not reading device saying no usb device. My suggestions? Thanks.

amazon.co.uk/VIS…PZB