I have had this issue for many months and cannot seem to find solution. Everytime screen goes off, as in, answering phone, or whenever it is not used and screen goes off, it never comes back on unless I go through reset over and over again. This is a real pain. I keep phone plugged into computer so it is fully charged all the time. I also have phantom issues of keys being hit without touching phone, it will call last call on its own, like it is haunted. This comes and goes, but black screen is constant. I set the screen to stay on when plugged into computer which helps, but I cannot put to ear or screen goes black and will not come on, so I have to use speaker phone to keep screen lite.
Phone is hardly used, hardly ever take it outside of office, so it is always plugged in and fully charged. I have very few applications, and removed them to test, same problem, no other things done, fully stock from factory. Any ideas before I jumk it.