Right now I have my phone set to sleep after 2 minutes to save screen time, battery, yadda, yadda. However, when I plug it in to charge it, the screen never goes to sleep. It stays on, which is usually for the entire night when I am charging. I brought it to US Cellular and the guy just reset my sleep mode time, which I had already done. Am I missing something here or is there just something wrong with my phone? I don't want my screen to wear out from it being on all the time.