on my power control, what exactly does the sync (2nd from right) do? is it one of those things that if im asking, i probably don't need to have it on? i tried to search but i came up with about 20 pages, and none of the titles seemed to address my question. i saw something about gmail, which i dont use, and some other things i feel like i got in over my head going from a razr2 to this phone. lol.