The TSA has announced that it is tightening it’s scrutiny of mobile devices on flights coming in to the US. You may have been asked to turn on your laptop when going through security, but now, you will likely be asked to turn on your mobile phone, if it is not already on. The TSA has said that powerless devices will not be allowed on board the airplane. So, be sure to charge your phone before your flight so that if you are asked to turn it on, you won’t have any problems.
Read more about it in this article from ABC News: http://abcnews.go.com/US/cell-phones-scrutinized-tsa/story?id=24445160