Updates are meant to help improve your device and we certainly understand your concerns here. When the screen is resetting, is it the apps being moved, or the wallpaper completely going back to the original? In regards to service, have you attempted resetting your network settings to refresh connection?
Follow us on Twitter @VZWSupport
If my response answered your question please click the "Correct Answer" button under my response. This ensures others can benefit from our conversation. Thanks in advance for your help with this!