I have read in a thread here to back out of an app...how do I do that? I am new to smartphones and android. Also, to save battery life, I think I read to turn off data. I have already turned off 4G. If I turn data back on when checking FB, etc, does it give me the most updated posts? Where would I turn off "syncing". Any hints would be greatly appreciated. I just learned the one about tapping the top data bar for brightness. I feel like these are all secret things...only passed on by WOM! Like being at In N Out!