UNIDEN UBCD3600XLT

[DAZ69]

Hi i have this scanner,but cannot get the trunk discovery to run.first time i selected the option it came up with a list of locations ect, none were near to me so i chose birmingham uk, never heard much so deleted the run, now when i try to go back in new session it says select system nothing found ect, where am i going wrong? any one know i can get back to do a search?