so basically to save you battery . should i use JD?
Right, deep sleep is a battery saving state when phone is not in use. JD makes a smartphone dumb by disabling the radios. It generally uses more battery than it saves. I don't use, nor recommend JD(Have tried it though, and quickly realized it ruins a smartphone and makes no difference in life). However, some people still seem to think it's some great gift from God, but they are mistaken. A simple script to UV and UC/OC can take care of all your battery saving needs. Or if you can't manage to run a script use system tuner to do these things.
If you are planning on running an ICS rom you cannot not UV or OC until kernel source is released, though. You can UC it
XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer?