Unaweza kutumia ADB, ukadownload image ya smartphone yako, uka install JDK na Android SDK kwenye computer, halafu uka push image from your computer to your smartphone using ADB via USB.
adb install C:\Update\Update.zip will install the system stored in C:\Update\Update.zip to your smartphone.
Google how to do that via ADB for more info.
Google is your friend.