Screen on time, I'm assuming you're talking about battery life, I get about two hours so, burning through about 90% of juice say if im watching a movie or playing a game. That's about average for a phone with the screen size, and the spec such as ogp. You can't get better than that, there was a lengthy discussion on the issue regarding the battery life that you've missed. That's why it's important to get madmack's modem and get the deep sleep for your phone. If you can't deal with ogp's screen on time provide by the regular battery, you can always get the zero lemon's 9100ohm super size battery, which I heard gives you up to 6 plus hours of screen time. Check the ogp's accessories section for more info. Last thing if your phone comes with kk, go ahead and try root it with towelroot, you may be able to root it, it's the easiest method. Otherwise, search xda on how to root ogp with the stock kk, you will find more info on universal root there.