Electronic Devices are now banned on some international flights
Trump and the executive branch of Government has now issued orders instructing Customs and Border Patrol to bar entry for those passengers flying in on certain international flights. As best I can determine here are the details so far. It is really a ban on the electronic instruments not on the persons themselves and the ban is limited to people from 13 countries.
The ban on electronic instruments is limited to those devices which are larger than a cell phone. Therefore, cell phones are ok to travel with you. The ban does apply to laptops, I-Pads, Tablets, and electronic readers (nook, kindle). It may also include electronic games and DVD players,
The ban appears to only apply to some flights on these airlines but only direct flights from these arilines into the United States: Arik Air from Lagos; Egyptair from Cairo; Emirates from Dubai and Athens; Ethiopian from Addis Ababa, Lome in Togo and Dublin; Etihad from Abu Dhabi; Kuwait Airways from Kuwait; Qatar Airways from Doha; Royal Air Maroc from Casablanca; Royal Jordanian from Amman; Saudia from Jeddah and Riyadh; South African Airways from Johannesburg and Dakar; and Turkish Airlines from Istanbul.
Electronic devices are banned if you are a national from these countries: Presently the US Government has not specified nationality as one of the criteria. Presently, it is only if you are traveling on a flight from one of the countries specified and its a direct flight.
Evidently, laptops and other large devices will be permitted on the international flight if packed in luggage that is not carried on the flight. U.K. flights are similarly handling electronic devices.