Now that Apple finally has a large smartphone, it's venturing into places that were previously off-limits. Case in point: United has announced that all of its 23,000 "mainline" flight attendants will get the iPhone 6 Plus in the second quarter of 2015. Staff will initially use the supersized handset to check email and manuals (typically on the ground) as well as handle your mid-flight headphone and snack purchases. The airline isn't stopping there, however. Future upgrades will let crews report cabin problems, and there are promises of more "customer-focused tools" to help you out. United isn't the first American carrier to use giant phones in the air, but its iPhone plans could still do a lot to make your next flight go smoothly.