Correction: This story has been updated to accurately explain how Airplane Mode works.
A family from San Jose, California, returned from an overseas trip with several memories. But the strongest may be the one that greeted them at home — an iPhone bill with more than $13,000 in data charges.
The Chung family prepared for their trip to Vietnam with a firm rule that the iPhones would be on Airplane Mode to avoid roaming and internet fees. So it appeared son Nicholas Chung was in trouble when the T-Mobile bill showed the sky-high data charges coming from his number over a 30-minute period.