'''bold text'''''''''I am having the same issue with my phone and makes me rather angry... Others are having the same issue as well. http://news.softpedia.com/news/HTC-EVO-4G-Users-Report-Power-Button-Crack-Issue-152326.shtml check out this site it could be the cause of the issue bc I do have a crack on my phone by the power button... call sprint the more who do the better chances of free phone replacement... ''''''