The rules on when to turn off electronic devices on airplanes have long been a sour, and sometimes contentious, point for travelers. But faced with a surge of electronics on airplanes and under pressure from a growing number of tech-savvy — and increasingly tech-dependent — passengers, the Federal Aviation Administration recognized that change was inevitable. This week, an F.A.A. advisory panel will meet to complete its recommendations to relax most of the restrictions. The guidelines are expected to allow reading e-books or other publications, listening to podcasts, and watching videos, according to several of the panel’s members who requested anonymity because they could not comment on the recommendations. The ban on making phone calls, as well as sending and receiving e-mails and text messages or using Wi-Fi, is expected to remain in place, the panel members said.