CyanogenMod 11 Nightly is now ready for the Sprint variant of the Samsung Galaxy S3. Now, if you want to update your device with this brand new custom ROM, then you should follow all the info that I’ve listed in this article.
The guide below contains all info required along with a preparation guide that teaches you how to configure the Galaxy S3 Sprint, so that you’ll complete the update at your first attempt. More info about the CM 11 Nightly can be found at the CyanogenMod blog web page here.
Read the guidelines below before starting the installation process of CM 11 Nightly on your Sprint Galaxy S3:
- Use this post only with the Sprint variant of the Samsung Galaxy S3.
- do not attempt to update any other smartphones using the instructions that I’ve listed in this post.
- Your phone has to be rooted and running the latest version of CWM / TWRP Recovery mode.
- both CWM and TWRP are supported by this guide.
- in case whichever custom Recovery variant you decide to use is not updated to its latest build, then you shouldn’t try to flash the CM 11 KitKat Nightly.
- In the tutorial you will find the ‘NANDROID ROM Backup’ step, don’t skip it.
- it will set a restore point for your device, one that you can use in case the new CM 11 Nightly ROM doesn’t boot in normal mode.
- Factory Reset is required for this new ROM to boot successfully.
- this step is listed in the tutorial, too, so you shouldn’t skip it.
- ‘factory reset’ wipes all data stored on your computer, while leaving the internal storage unaffected.
- you can skip ‘factory reset’ only in case your device already sports a previous CM 11 Nightly build.
> if you do skip ‘factory reset’ and the phone doesn’t boot in normal mode after installing CM 11 Nightly latest build, then you will be forced to repeat the entire tutorial without skipping any steps.
- Backup data from installed applications, SMS text messages and APN Internet Settings using the following tools for Android: Helium | SMS backup & restore | APN Settings Backup & Restore.
- root access is required for these guides.
- Sync your Contacts info with your Gmail account.
- guide here for those of you who don’t know how to do it.
- Enable USB Debugging from Developer Options menu.
- This is a guide for advanced users, do not blame us in case you brick the phone or you lose any important data in the process.
- Check the phone’s battery power levels, so that it won’t switch off in the middle of the updating process.
- For any extra questions you should use the comments field at the end of this post.
Since you’ve read all of the above, then you should continue to the next part of this post.
This guide is for advanced users and it should be flashed only if you want to tinker with your device’s OS, in order to see how one of the most popular KitKat ROMs works with your smartphone. Remember that this is not an official release by Samsung nor Sprint, but a custom build designed by the CyanogenMod team.
Nightly builds are usually the first versions to be released and these contain bugs and errors that will be fixed with new releases. CM 11 Nightly can be updated on a daily basis with new builds using the CyanogenMod Updates section under Settings> About phone menu.
How to flash CM 11 Nightly for the Sprint Samsung Galaxy S3:
- Download the CM 11 Nightly zip from here.
- Download Gapps for Android 4.4 KK ROMs from here.
- Connect your phone to your PC, then move your both zip files to your device’s internal storage.
- after the files are copied you can disconnect the phone from PC.
- Power off your smartphone now.
- Boot the Galaxy S3 in CWM Recovery Mode.
- if you don’t know how to boot such custom Recovery Mode, then you can learn here.
> both CWM and TWRP should work with this guide if both are updated to the latest version.
- First thing that you need to do is to create a full NANDROID ROM Backup for the installed OS:
- CWM: select ‘backup and restore’, name the file and complete the process.
- TWRP: press Backup, name the backup file and swipe to confirm.
> don’t continue to the next step without creating the backup.
- Next. apply the Factory Reset for your device:
- CWM: select ‘wipe data/ factory reset’, then confirm the process.
- TWRP: press Wipe, then swipe to confirm Factory Reset.
> don’t skip this step, unless you’re running a previous CM 11 Nightly build.
- Now you can finally flash the ROM:
- CWM: select ‘install zip from sdcard’, then ‘choose zip from sdcard’, find the CM 11 zip and confirm its installation.
- TWRP: press Install, then browse the internal storage for the CM 11 zip. Swipe to confirm installation.
> don’t press any buttons until the process is complete.
- When the ROM is installed, you need to select once again the ‘choose zip from sdcard’ and flash Gapps.
- After you complete installing both zip files you can return to the main custom Recovery screen.
- Reboot your phone now in normal mode.
> don’t press any buttons until the first boot process is complete.
> note that the first boot will take somewhere around 5 minutes to load all files.
- Enter your CyanogenMod or Google Account details in order to take control over your smartphone.
These were all the steps that you had to take in order to successfully update your Sprint Galaxy S3 to Android 4.4 via CM 11 Nightly. I hope that you managed to flash the ROM without problems and that you’re testing right now all of its features.
NOTE: In case the first boot process takes too long to complete, it doesn’t go past the CyanogenMod boot screen or it enters into a boot loop, then you will be forced to repeat the entire tutorial once again. Make sure that in case you do decide to repeat the installation, then you have to make sure to apply the ‘wipe data/ factory reset’ step along with ‘format /system’, which can be found in the Advanced Recovery Mode settings menu.
If you cannot complete the guide or you have any other related questions, then you should ask for more help in comments and we will come up with solutions for you.