The iPhone 4 “antennagate” class action settlement has now been announced, offering U.S. resident iPhone 4 owners who did not opt to receive a free bumper case from Apple to claim a $15 cash payment instead. To be eligible for the cash payment, iPhone 4 customers must also meet several additional requirements: they must have actually experienced antenna or reception issues, been unable to return their iPhone 4 without incurring any costs,…