I Added a Mod version of 2.2 before the official updates came out. The version I have has been having all kinds of issues, and the phone runs a lot slower then it before with 1.6. I would like to restore it back to factory or 1.6. I have tried using SAPPIMG.nbh but it did not work. Also, Is their anyway to force it to update on it own after setting it back to factory?