Originally Posted by J3D1
What does a system reset do? Will I have to ad all my contacts and preferences and downloaded apps/ringtones/music and stuff again?
If you are talking about "factory reset" then yes and no. It basically wipes the phone to a state as if you just bought it new. You have to sign in with your account again, but if you previously selected the options to back up data (under one of the settings on the phone) then all you apps will be there in the Market waiting to download again. You won't have to pay anything. They will just be there. This was the only way I was able to solve my lag issue after updating, but it was worth it. Yes I had to set up all my stuff again, but now it's like a new phone.