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AOSP CyanogenMod 10 (CM10) ROM for Nexus S [Guide]

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An unofficial CM10 ROM based on Jelly Bean Android 4.1 has been released for the Google Nexus S, by XDA Senior Member legolas93, compiled from sources and with everything in the ROM working, contrary to previous Jelly Bean ROMs for the device. Jelly Bean features a smoother interface, advanced voice recognition and search functionality, better keyboard, improved and actionable notifications area, and a lot more which you can read about here.

NOTE: This is a preview version of CM10, and as such most of the custom features of CyanogenMod ROMs haven’t been added to the ROM yet, so this ROM is mostly a fully stock Jelly Bean ROM with a few mods added. There may also be a few small bugs and issues, though none of them should be major.

So, read on to find out how you can install CM10 on your Nexus S.

Compatibility

This ROM and the guide below are compatible only and only with the international GSM Nexus S. It’s not compatible with any other device. Check your device model in Settings » About phone.

Warning!

The methods and procedures discussed here are considered risky and you should not attempt anything if you don’t know completely what it is. If any damage occurs to your device, we won’t be held liable.

How to Install CM10 on Nexus S

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  1. This procedure will wipe all your apps, data and settings. Backup your Apps and important data — bookmarks, contacts, SMS, APNs (internet settings), etc. This Android backup guide would help you.
    Important! Don’t forget to at least make a backup of your APN settings, which you can restore later if your data connection does not work after installing the ROM. Use the backup guide to find out how.
  2. Make sure the bootloader on your Nexus S is unlocked and you have ClockworkMod recovery installed. You can use the Nexus S toolkit here to install ClockworkMod recovery.
  3. Download the latest version of the ROM from the official development page.
  4. Download the Superuser-3.2-RC2-arm-signed.zip file, which will root the ROM.
  5. Download the Google Apps package. This will install apps like Market, Gmail, etc. which are not present in the ROM.
    Download Gapps  |  Filename: gapps-jb.1.zip
  6. Copy the downloaded zip files from step 3, 4 and 5 to the SD card. Do not extract them.
  7. Boot into ClockworkMod recovery. To do so, turn off the phone. Then, press and hold the Volume Down and the Power buttons together to boot into fastboot mode. Here, highlight the RECOVERY option by navigating to it using the volume buttons, then select it using the Power button to boot into recovery.
    In recovery, use the volume buttons to scroll up/down and the power button to select an option.
  8. Perform a Nandroid Backup of your existing ROM, so that you can always restore it from recovery if something does not work out with this ROM. To perform a backup, select Backup and Restore –> On the next screen, select Backup again. Go back to main recovery menu after backup is complete.
  9. Select wipe data/factory reset, then select Yes on next screen to confirm. Wait a while till the data wipe is complete.
  10. Select install zip from sdcard, then select choose zip from sdcard. Scroll to the ROM file on the SD card and select it. Confirm installation by selecting Yes – Install _____.zip on the next screen. The ROM will start installing.
  11. After ROM installation completes, select choose zip from sdcard again, then select the gapps-jb.1.zip file to install the Google apps package.
  12. After Google apps package installation is complete, select choose zip from sdcard again, then select the Superuser-3.2-RC2-arm-signed.zip file to install the root package.
  13. After root package installation is complete, select go back then select reboot system now to reboot the phone into CM10.
  14. Returning to Previous ROM: To go back to your previous ROM, boot into recovery, select backup and restore then restore your previous ROM by selecting it from the list.

Making Root Access Work for Apps

In order to allow apps to gain root access, do the following as otherwise root access won’t work:

  1. Open the Superuser app from the apps menu on the phone.
  2. Click on OK on the screen that pops up. Then click on the settings button (wrench icon) on the top right (or click the menu button and select Settings/Preferences).
  3. Then, click on Security, then on Automatic response, then select the Allow option.
  4. Then close the Superuser app.

CM10, based on Android 4.1 Jelly Bean is now installed and running on your Nexus S. Visit the official development page for more info and to get the latest updates on the ROM. Share your thoughts on the ROM in the comments.

Published: 
  • seQ

    “7. Boot into ClockworkMod recovery. To do so, turn off the phone. Then, press and hold the Volume Down and the Power buttons together to boot into fastboot mode. [...]”

    On Nexus S, you have to press and hold the Volume _UP_ and Power button. Thx anyway for this guide! Cheers

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