I'm seeing more and more threads about laggy and battery problems after the 2.2 update. So I figured I'd make a thread that answers all the questions. I have not talked to anyone who installed the leaked RUU who is having any issues with 2.2. All the people who are reporting problems are people who installed the OTA. For those who don't know, the RUU was a flash. It wipes everything out of the phone and reinstalls a clean copy of Android 2.2 The OTA was an update. All that does is overwrites your system file and few other files, and that's it. Because of this, you will have compatibility problems with apps installed from 2.1 on 2.1. The same thing happened with Eris & Droid users going from 2.0 to 2.1. I'm posting Quadrant Scores higher than the Nexus One (consistently) and I'm getting 12-18 hours out of my battery. I'm noticing a huge increase in standby time, as compared to 2.1. So those of you who are experiencing Lag, Force Closing, and Poor Battery Life. The best thing to do is hard reset. You're contacts are likely backed up to Google, If you have the save destination on your pictures set to go to SD Card then those wont be touched, and Since you're using 2.2 you're apps will also back up & resync. So if you're experiencing problems, this is the first step to troubleshooting. If you do not know how to hard reset, you can go to: Settings > SD & Phone Storage > Factory Data Reset > Then choose Phone & Internal Storage. Not to sound like a jerk, but these are the necessary troubleshooting steps to fix the lag that many people are experiencing. If you are not willing to do this, don't bother posting asking how to fix your lag & battery problems.