President Donald J. Trump apparently has continued to use his personal Android smartphone despite security concerns. Trump was concerned about losing access to his personal phone even prior to taking his oath of office, according to aides who said he worried about how isolated he could become in the White House without his phone to keep in touch with friends. The president recently reportedly told a friend he had given up his phone as security officials urged him to do, but it appears that he has continued to use his personal Android to tweet.