(Reuters) – Samsung Electronics Co Ltd said on Friday that a software update for Galaxy Note 7 smartphones will be released mid-December in the United States preventing them from charging and functioning as mobile phones, rendering them useless. The smartphone maker said that more than 93 percent of all recalled Galaxy Note 7 devices had been returned as a part of its exchange program in the United States. http://bit.ly/2glcQtG The U.S. …