PONTIAC, Mich. – A man used a gun that turned out to be fake to rob a man during a cell phone sale Monday in Pontiac. Authorities said the victim went to a home in the 100 block of Cadillac Street to buy the phone. The seller told him his uncle would come outside to complete the sale. The victim told deputies a man came outside, got into his vehicle, held a gun to his head and pulled the trigger. A 57-year-old Pontiac man was arrested and deputies were able to recover a replica handgun.