Before Installing the OTA: MAKE SURE: -You have all stock apps intact. -You are running Stock 2.1 DONT WORRY ABOUT: -Root is fine, you will lose root though. -Launchers, Apps, lockers, etc. If you do not meet either of the "MAKE SURE" requirements. You need to SBF Flash your phone BEFORE you apply the OTA. It is Imperative you DO NOT install the OTA with any of these "MAKE SURE" Issues unresolved. These will cause the update to fail, these will update your boot loader, these will brick your phone.