After updating to ICS my phone is acting up terribly, which seems to be a common theme from looking around the forums. I want to do a factory reset, but I am not sure exactly what I will lose and what will stay. There are a lot of topics on this in this forum and other places, but I'm getting a lot of conflicting information and most of it is just bits and pieces. 1) It looks like there are different phrases (factory data reset, factory reset, hard reset, etc) Which do I want to lose as little as possible? Basically I just want to get my phone working decently again. 2) What will I lose permanently? (I do not have an external SD card, everything is internal) 3) After I reset, what order do I do things in to get whatever back that can be saved from Kies? Do I sync with Google first? 4) How do I prevent Google from automatically re-downloading all my apps? (I have my account tied to multiple phones and don't want all the apps in my account on this phone) I saw someone say that there is an option not to sync the google account with the phone to stop it, but would that then cancel out my next two items?... 5) Will I lose the actual app data? In my back up and reset menu in Settings, I have Automatic Restore checked. It says when reinstalling an application the settings and data will be restored. Is this true after a factory reset? 6) On that same Settings page it is checked to back up my wi-fi passwords and "other settings" to Google's servers. What does this include and will it all come back after a factory reset? 7) Kies says it's backing up "Messages". I assume those are my text messages. Is this correct? Is there anything else I should know?