Simple steps but slightly long but working steps to get back to stock rom from cyanogenmod 10 alpha 4. Download the file first from [ Login above or register to see download links. ]
  1. 1 Go to download mode (vol down+home button+power) and then flash it with pit file(latona), leave everything else empty and repartition ticked.
  2. 2 Now again restart the phone in downloading mode(by replacing battery) and flash with other files in the tabs except phone ie modem file and now make sure to untick the re partition.
  3. 3 Now again repeat the step 2(only) with the modem file included in the phone tab. and reflash it with the repartition unticked.
  4. 4 Success!!!!
  5. 5 Do factory reset.