If I root my Android phone, will I lose all of my data? As the question title implies, if I root my Droid Incredible (or any Android phone), will I lose all of my data? I'm not interested in installing a custom ROM right now so will rooting cause me to lose my data? Also, which tool should I use to root the phone?

Edit #1: Based on a suggestion, I rooted my Incredible using Unrevoked, and I didn't lose any information.
Short answer: no

Long answer:

Rooting -- if successful -- doesn't change any of your data, it just gives you root access.

Now, if you reflash your phone's ROM -- something you can only do with root access -- then, yeah, you might lose stuff. A lot of people automatically associate rooting with switching ROMs, since rooting is required. But you can root, and then do nothing, if you want.

I'm so lazy, I rooted and installed a screenshot app; but it was so worth it. [Okay, not lazy -- I just don't have the need nor desire for much else, at the moment. But if I want to, I can.]

Caveat: anything done really, really wrong can screw things up. See: Are there any risks to rooting a device?