I have a US cell phone and a UBER account based in the US. Whenever I travel on UBER in the US (I've also done so in the UK) my ride is automatically charged to my US credit card. Someone told me that in BA drivers want cash. If I pay cash, my credit card will also be charged. Could someone clarify this. Also, do people in BA ever call their drivers from their cell phones (in case of problems)? If so, I guess I couldn't do this since the phone has a US number.