Originally Posted by mac227
i have a nexus S and recently updated to JB
I keep my data turned off when not using it to save battery.
Easy solution, leave Data on. Unless you're in a very weak signal area, leaving Data on doesn't use up much battery. Mine is always on and I have no issues with battery life. Turning data off only saves me about 5% battery, so it's not worth it to me to turn it off and on.