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stock image

  • download soju

Factory Images for Nexus Devices

  • follow this guide

Nexus S Guide: Flash Android 4.1.2 JZO54K Factory Image

upgrade Android version

  • download Cyanogenmod


I would start with a stable version e.g. something like this: [2].

  • Put the .zip file with a USB cable to the Nexus-S root
cp /media/8495-0F02/
  • We also want Google Apps [3]

put the .zip file on the root folder

cp /media/8495-0F02/
  • eject the USB drive from your PC
  • start ROM manager (If you don't already have it get it from Android market)
    • Flash ClockworkMod Recovery
    • Reboot into Recovery
  • Once the device boots into the ClockworkMod Recovery, use the side volume buttons to move around, and either the power button or the trackball to select.
   Optional: Select backup and restore to create a backup of current installation on the Nexus S. 
  • Select the option to Wipe data/factory reset.
  • Then select the option to Wipe cache partition.
  • Select Install zip from sdcard.
  • Select Choose zip from sdcard.
  • Select the CyanogenMod
   Optional: Install the Google Apps by performing steps 7 - 9 again and choosing the Google Apps 
  • Once the installation has finished, select +++++Go Back+++++ to get back to the main menu, and select the Reboot system now option. The Nexus S should now boot into CyanogenMod.

new version?

CyanogenMod 9 on Nexus S