Galaxy S3 NEO CM12.1 (CyanogenMod 12.1, Android Lollipop) ROM is based on Android Lollipop 5.1 is again brought to you for Samsung Galaxy S3 NEO GT-I9300i, GT-I9301i and i9301Q by xda senior member Rox. Earlier Rox had built CM 12 and CM 11 for Galaxy S3 NEO. In addition to this we also have the S3 Neo Lineage OS 13 ROM, CM13 Marshmallow ROM for S3 Neo.
Installing custom ROM requires a custom recovery to be installed on your Samsung Galaxy S3 NEO, which may VOID your warranty and may delete all your data. Before proceeding further you may consider backup your all data. You are the only person doing changes to your phone and I cannot be held responsible for the mistakes done by you. Neither the developer nor we will be held responsible for any disaster that happens to your device.KNOWN ISSUES:
– NFC ( Can’t be fixed, because of lack of sources )
– Audio in calls on 2nd SIM ( GT-I9300I only )
– Some devices have non-working camera because they have different sensor – HERE IS THE FIX
![[CM 12.1] S3 NEO CyanogenMod 12.1 Lollipop ROM i9300i, i9301*](http://cyanogenmods.org/wp-content/uploads/2016/02/galaxy-s3-neo-cm-12.1.jpg)
REQUIRED DOWNLOADS AND LINKS FOR THE CYANOGENMOD 12.1 S3 NEO LOLLIPOP ROM FLASHING GUIDE:
- ROM download link
- Google Apps download link
- TWRP recovery for S3 NEO by ROX.
Here is TWRP recovery Flashing for Galaxy S3 NEO.
If required:
– The 15 seconds adb installer and the minimal adb and fastboot for Windows
– ADB Fastboot Installation guide for Linux and MAC
Galaxy S3 Neo CM13 (CyanogenMod 13) ROM Update for [GT-i9300i, i9301i and i9301Q]:
Have a look on the recently published: Galaxy S3 NEO [GT-i9300i, i9301i and i9301Q] CM13 (CyanogenMod 13) ROM
GALAXY S3 NEO CyanogenMod 12.1 LOLLIPOP ROM INSTALLATION GUIDE:
If you have not yet installed a custom recovery on your S3 Neo then head on to the next link to get it done.
Galaxy S3 Neo Rooting guide and custom recovery installation
Points to NOTE on Backup:
– Try to avoid restoring apps backup using Titanium Backup. It may break things up.
– Don’t restore system data using Titanium Backup! It will definitely break the current installation.
– It is also discouraged to Restoring Apps + Data using Titanium Backup.
Follow this if you are flashing CyanogenMod 12.1 ROM for the first time to your Galaxy S3 NEO phone, or coming from another ROM:
- Download and Copy the GApps and Galaxy S3 NEO CyanogenMod 12.1 Lollipop ROM ZIP to your phone.
- Reboot the S3 NEO into recovery mode (Hole Volume UP + HOME + Power button while the phone is booting). Make sure to have a Custom recovery like CWM or TWRP or any other custom recovery on the Galaxy S3 NEO.NOTE:
It is recommended to use the CWM recovery, especially for the GT-i9300i users. - Wipe data factory reset, Cache partition, Dalvik Cache and Format the System partition.
– Here is a guide explaining how to wipe data using TWRP recovery.This will delete all your data on your phone. IGNORE IF YOU DON’T WANT TO OR IF YOU HAVE ALREADY DONE THIS. You may consider complete backup of your phone data or take a NANDROID backup of the current ROM.
– How to backup all data on your Android Device.
– how to take NANDROID backup using TWRP recovery. - First flash the CM12.1 ROM ZIP from device. Then flash the GApps zip from your device memory.
– Here is a post explaining how to flash a custom ROM using TWRP recovery.
– Use the same guide to flash the GApps too. - Reboot and Enjoy the CyanogenMod 12.1 Lollipop ROM on your Galaxy S3 NEO.
Upgrading from earlier version of CyanogenMod 12 ROM on Galaxy S3 NEO:
- Copy the latest Galaxy S3 NEO CyanogenMod 12.1 ROM ZIP file to your phone.
- Boot into Recovery.
- Flash the latest CM ROM ZIP from your phone.
– Here is a post explaining how to flash a custom ROM using TWRP recovery.
– Use the same guide to flash the GApps too. - Reboot and Enjoy
The flashing may take a while, so be patient. When it will be done you can reboot your phone and enjoy the Galaxy S3 NEO CM12.1 (CyanogenMod 12.1, Lollipop ROM), the Android Lollipop touch with CyanogenMod.
After this CyanogenMod 12.1 ROM installation you may want to enable ROOT access on your phone and here is how you can do that:
How to Enable ROOT Access on CyanogenMod 12/12.1