Install Android 5.1.1 Lollipop CM12.1 on Sprint Galaxy S3. Galaxy S3 made a tremendous impact on Android users when it was released. The main reason behind its success was the specifications it has. Some of its specs include Qualcomm Snapdragon processor, 8 megapixel camera, 2100 mAh battery, 4.8 inches Super AMOLED touchscreen with 720 x 1280 pixels resolution and much more. After making the Sprint Galaxy S3 users wait for what seemed like a lifetime, Cyanogenmod community has finally released a stable version of CM 12.1 custom ROM based on the latest Android 5.1.1 Lollipop Operating system. This ROM comes with additional features from Cyanogenmod along with Android Lollipop features. So you are getting a combo pack of features with this custom ROM. With this Cyanogenmod 12.1 ROM you can enjoy and experience bloatware free, battery efficient, tons of customization and daily nightly updates on your Sprint Galaxy S3 smartphone.
The procedure mentioned below on how to install Android 5.1.1 Lollipop CM12.1 on Sprint Galaxy S3 is quite risky and a slight mistake can completely damage your phone. If such happened then neither do I nor the developers of this ROM will be held responsible for that. Although the chances that your device will get damaged are least still I recommend to follow each and every step properly. This Cyanogenmod 12.1 custom ROM must be installed only on Samsung Galaxy S3 Sprint having model number SPH-L710. Do not flash this ROM on any other device except the one mentioned as it may brick your phone. Better check your device’s model number from Menu->Settings–>About Phone.
- Make sure you’ve charged your Sprint Galaxy S3 at least up to 60%. This is important as lack of battery power may increase the risk of interruption during flashing process.
- As everything gets wiped in the last step of this procedure, backup all your phones data and settings including contacts, messages, call logs, memos etc. to your phones SD card or on your PC for more safety.
- A folder called EFS is present in your phones system directory which contains all your phones specific information such as the IMEI, wireless devices MAC addresses, product code, and much more. If by mistake this folder gets wiped out then your device will be completely useless & will no longer be recognized by your carrier. Refer our article to backup and restore EFS/IMEI data:
- Make sure you have installed mobile specific drivers on your PC. This is important so to recognize your Sprint Galaxy S3 when connected to PC. You can install them by installing Samsung Kies or manually install them from the link given below:
- Make sure your Sprint Galaxy S3 is rooted.
- A custom recovery like Clockworkmod (CWM) or TWRP must be installed before proceeding further. You can install CWM touch recovery using the given steps:
Step 2: Launch the Odin Software on your PC. Then switch off your Sprint Galaxy S3 completely.
Step 3: You need to boot your phone into download mode. For that, press and hold Volume down key + Home button (middle button) + Power button till you see a warning message. Then leave all the three keys and just press the volume up button to land into download mode.
Step 4: Keeping the phone in download mode connect it to your computer. As soon as you connect it, you’ll see the ID:COM section in Odin is turned yellow. Also an Added message will appear in the message box window. This will confirm that your Sprint Galaxy S3 has successfully connected to computer. If it’s not showing, then re-install device drivers on PC.
Step 5: Tick the Auto Reboot option and F.Reset option located on the Odin window.
Step 6: Now, tick against ‘PDA’ button and navigate to the downloaded philz_touch_6.07.9-d2spr.tar.md5 file & select it.
Step 7: Now initiate the process by clicking on the Start button located on the Odin window.
Be patient and wait for a minute until the process completes successfully with a Pass message.
That’s all! You’ve successfully installed the CWM touch recovery on your Sprint Galaxy S3. Now head on to the actual article on how to install Android 5.1.1 Lollipop based CM 12.1 ROM on Sprint Galaxy S3 smartphone.
Procedure to install Android 5.1.1 Lollipop on Sprint Galaxy S3:
Step 1: Download both the zip package files in a specific folder on your PC. Do not extract them.
Step 2: Now connect your Sprint Galaxy S3 to PC using USB cable, enable mass storage mode and copy the downloaded files on your phones SD card.
Step 3: Then safely disconnect your Sprint Galaxy S3 from PC. Switch it off completely and boot into CWM touch recovery mode. For doing so, keep pressing and holding Volume up+ Home button (middle button) + Power button till you enter recovery mode.
Note: Touch works here in this CWM touch recovery. So no need to use volume or home keys for navigation or selection.
After you enter recovery, the first thing you need to do is take a nandroid backup of your current using ROM. This Nandroid backup is the backup of your phones entire operating system & is always helpful during the failure while flashing process or during any problem with the ROM, then you can easily restore your saved previous ROM.
Refer our detailed article for taking Nandroid backup:
Step 4: For taking a nandroid backup of your current ROM, select the ‘backup & restore’ option on the recovery mode itself and on the next screen select ‘backup’ option. This will make a complete nandroid backup and will be saved on your phones SD card.
Step 5: Now you need to wipe data and cache partitions from your phones internal memory. For doing so, select the ‘wipe data/factory reset’ option. On the next screen press Yes option to start the wiping process. Similarly select the ‘wipe cache partition’ option to wipe the caches. Remember that wiping will clear out every data present on your phone so make a complete backup before implementing this step.
Step 6: Return to the main menu and select the Advanced option located on the recovery mode itself. On the next screen select Reboot Recovery option.
Wait until you boot again into recovery.
Let’s move to the actual Android 5.1.1 Lollipop based CM 12.1 ROM flashing process.
Step 7: Now click on the ‘install zip from SD card’ option. Then on the next screen select ‘choose zip from SD card’ option. This will show you all the files and folders present on your SD card. So just navigate to the Android 5.1.1 Lollipop based CM 12.1 ROM which you’ve copied earlier and select it. On the next screen select ‘Yes’ option to initiate the actual Android 5.1.1 Lollipop CM 12.1 ROM flashing process. Be patient and wait for the process to complete.
Step 8: Again wipe the data/cache partitions by selecting ‘wipe data/factory reset’ and ‘wipe cache partition’ options. This step is essential to solve the boot loop issue.
Step 9: Similarly flash the Google Apps package as you’ve flashed the ROM zip file. Just remember not to wipe data/cache after that.
Step 10: That’s all! Just reboot your Sprint Galaxy S3 by selecting ‘reboot system now’ option from the recovery mode. You’ll notice that the first boot takes more time to start than usual.
Note: If you want to restore back your previous saved ROM, then you can do that by entering back into recovery mode and then selecting ‘Restore’ option. Then you may select the saved ROM you want to restore.
Great! Your Samsung Galaxy S3 Sprint SPH-L710 smartphone has been successfully flashed with the latest Android 5.1.1 Lollipop based Cyanogenmod 12.1 Custom ROM. You can verify the same from Menu->Settings->About Phone. Enjoy the latest Android 5.1.1 Lollipop features along with Cyanogenmod 12.1 features with this ROM. Do share your experience after using it. Finally if you come across any difficulty while going through this process then do let me know through the commens section below. Till then enjoy! 🙂