Is there an option in the DB toolkit that you can configure to turn off 4g when the screen is off, and to turn it back on when the screen powers up? I'm not very familiar with the I/O scheduler and all of the other options in the toolkit. I get fantastic battery life when 4g is turned off, but it is a pain to keep turning it on and off when I want to use it. Is there a way to automate it? Also what is the best CPU setting (governor) for performance and battery life? Lastly what exactly is a kernel and can you point me in a direction to some useful ones because I'm pretty sure I'm still on a stock kernel, I have just flashed a few ROMs and radios. Thanks in advance!