21.How do I wipe my phone?
a. To wipe your phone first you must boot into recovery (either from cmd line or refer to FAQ 18). Once in recovery chose Wipe. Typically you only need to choose "Wipe data/factory reset." However, sometimes you must choose "Wipe Dalvik-cache" and sometimes even "Wipe SD:ext partition" it all depends. If you wipe data and are still having problems, you can always wipe Dalvik as well. You typically only need to wipe EXT either if the ROM Dev tells you to, or if you previously had apps2sd enabled on a different ROM.
22.When do I have to wipe my phone?
a. You have to wipe your phone anytime you change from a 1.5 to a 1.6, 2.0, or 2.1 ROM. This also applies if you are going back down from any of those to another. Typically the Dev that makes the ROM will put up instructions on how to install it, which usually consist of wiping. They will also typically tell you if you have to wipe anything other that data. Please be sure to read the instructions on every ROM, as each is different.