Now that CM10.1 Android 4.2.2 Jelly Bean update is made available for Sprint Nexus S 4G SPH-D720 variants, subscribers who own such a device model may already go for an upgrade. While major changes don’t come with this build, upgrading to such custom ROM would mean improving the overall security on your Google Nexus device.
A simplified approach on how to install CM10.1 Android 4.2.2 Jelly Bean update on your Sprint Nexus S 4G SPH-D720 is subsequently elaborated in this page. This will serve as reference to those who wanted to upgrade their Nexus phones with this build.
This guide is only for Google Nexus S 4G D720 and should never be tried on any other Android device. Be sure to check your device’s Settings and About Phone details first, to confirm you’ve got the right device to upgrade with this custom firmware.
As you decided to use this tutorial, it is already understood that you do this at your own risk. Therefore, we will not be held responsible for any potential damages that may transpire later on when doing the process. However, it is very unlikely for your device to get ruined or damaged if you follow all the given instructions correctly as elaborated below.
To make sure the entire installation process runs smoothly, be sure to secure all prerequisites as follow:
- Backup of all necessary files in your device.
- At least 80 percent battery power on your device to avoid possible interruptions/hard brick during the installation process.
- Installed USB Driver for Nexus S 4G D720 in your computer.
- USB Debugging is enabled for file transfer between PC and phone.
- Device to upgrade is rooted and with ClockworkMod Recovery Installed.
- Downloaded zip files:
1. CM10.1 ROM 4.2.2 Jelly Bean ROM for Nexus S 4G D720 [Filename: cm-10.1-20130221-NIGHTLY- crespo4g.zip]
2. Google Apps [Filename: gapps-jb-20121212-signed.zip]
If all are good, then you may now begin with the installation. Again, in this guide, we are using ClockworkMod Recovery.
1. On order to get started, be sure to connect your phone and computer with a USB cable.
2. Once connected, copy your downloaded zip files (custom ROM and Google apps) to your phone’s SD card but DO NOT extract any file.
3. Disconnect the USB cable on both devices and then turn your phone off.
4. Turn it back on and boot into ClockworkMod Recovery. To do this, you have to press and hold the Volume Up, Power and Home buttons simultaneously until the Samsung logo pops up.
5. Release the buttons for about a second and hold them again to show the ClockworkMod Recovery screen. Use the Volume Keys to scroll up and down (when browsing for options). To select an option, use the Power key.
6. Do a Nandroid backup on your existing ROM so you can easily restore it later if necessary. To do so, select Backup and Restore option and a new screen will prompt. On that screen, select Backup again and then go back to the Main Recovery Menu once the backup is done.
7. Do a Data Wipe. To do it, select Wipe data/Factory Reset option and then select Yes on the next screen. This will confirm your action and data wipe should initiate. It will take a few minutes for the data wiping task to be completed. Wait until it’s all done.
8. Once data wipe is finished, return to the CWM Recovery main menu and select Wipe Cache Partition option. Under the advance option, select Wipe Dalvik Cache to instigate Dalvik cache wiping.
9. Select Install zip from SDCard and choose zip from SDCard.
10. Locate the zip file for the custom firmware you’ve downloaded and copied earlier. Filename: cm-10.1-20130221-NIGHTLY-crespo4g.zip. Select the file by pressing the Power button.
11. On the next screen, select Yes-Install option to confirm installation. This will initiate ROM installation.
12. Wait until ROM installation is completed. Once done, repeat step 9. This time, you have to select the file gapps-jb-20121212-signed.zip to install Google apps package.
13. Wait until installation of Google apps is done. Once finished, go back to the Main Recovery menu and choose Reboot System Now. Your phone should reboot by then.
14. Boot up into customized Android 4.2.2 Jelly Bean ROM CM10.1. Note that the first boot takes time, so just wait until its back up.
Congratulations! You now have successfully installed Android 4.2.2 Jelly Bean CM10.1 custom ROM on your Google Nexus S 4G D720. If you want to go back to your former ROM, just boot into Recovery and select Backup and Restore. Select your previous ROM from the given list to have it restored.