I haven't set up my iPhone as a new iPhone in over 2 years, and since it's running pretty slugishly after upgrading to iOS 7 and then iOS 8, I think I need to wipe it clean and set it up as a new iPhone. However, when doing this, how do I keep my texts, notes, and contacts? I can't lose these. (I've already backed up Camera Roll). When setting up as a new iPhone, will App Data be re-downloaded when I redownload the Apps, or will the Apps have no data saved?