When you say "restore to the latest version" what do you mean? Updates are installed OTA via mobile network, over WiFi, and through the Verizon Software Update Assistant and Repair Tool. There is no way to do this with no data connection of some type. If your device has the latest version, it cannot restore the latest version, unless you mean repair the latest now-current-to-your-phone version. Also, one cannot roll-back a version and then re-roll-forward, officially speaking.