This number is being used by a customer creating a fake uber account to book fake rides to scam Uber Drivers. People are booking fake rides then messaging drivers to call the mobile number with the goal of getting that drivers phone number, then they ring up and pretend to be from Uber support telling the driver a complaint has been made that their identity didnt match and that they need to do an identity check and instruct drivers to give them passwords etc so they can access drivers accounts to change the bank account details to steal drivers earnings.