A San Francisco teenager has received $2,021.07 phone bill because of a of iOS 9’s Wi-Fi Assist feature, which automatically switches phones to use cellular service when the owner is in an area with a weak Wi-Fi signal. Ashton Finegold made the unpleasant discovery that his bedroom was such a place, which meant that while he thought he was connected to his home Wi-Fi setup, his iPhone actually clocked up 144,000 MB of cellular data.
