Ok, first off I will tell you that I have had my Galaxy Tab since Nov. All of a sudden, the tab shuts down without notice and I'm not in the red and I use to get the low battery signal which sometimes I do and sometimes I don't now. I also get this message that my window limit has been reached. Never got that one before so I don't know what that is about other than now, I can't always get on the internet. The other thing is, only when I do get on the internet (not email, text, etc) the light on my tab dims and I have to go in and physically adjust the brightness when its already at the brightest setting. I don't get this. I have done nothing differently. Can someone please tell me whats going on with this dang Tab?