Hello, I've owned my Samsung Galaxy S5 for about 3 weeks and I can't figure out what's causing my Data & Battery to be used up so quickly. As of 8:00am this morning my battery was 100%, I used it for about 10 minutes to check Facebook and it's now at 17%. When I'm done with an app, etc I make sure to "close all". I'm not online a lot and when I am, I make sure Wi-Fi is available. I had an iPhone 4s prior to this, so Android is new to me...still trying to find my way around things. I will be buying the Samsung Galaxy S5 for Dummies this weekend..lol ! Thank you in advance for your help !