[ROM] [CM12] CyanogeMod 12 for Samsung Galaxy S3 GT-I9305 based on Android Lollipop 5.0.2

CyanogenMod 12 based on Android Lollipop custom ROM is brought to you for Samsung Galaxy S3 GT-I9305 by xda Recognized Developer DerTeufel1980.

Installing custom ROM requires a custom recovery to be installed on your device, which may VOID your warranty and may delete all your data.
before proceeding you may consider backup your all data.
Please visit the Disclaimer page below to agree with the risks involved and proceed before flashing this ROM to your phone:
ROM Disclaimer link


Files needed for this installation:
Samsung Galaxy S3 GT-I9305 CyanogenMod 12 ROM download link
Google Apps download link for Android 5.0

Installing Cyanogenmod 12 ROM:

Copy the CyanogenMod ROM and GApps zip file to your SD card or internal memory (By using a USB cable or via adb push command).

Reboot your phone into recovery mode (Hole Volume UP + HOME + Power button while the phone is booting)
Or if you have a PC in hand with USB driver installed for your phone then type the following command to enter into recovery mode:
$ adb reboot recovery
It is recommended to use the CWM recovery, especially for the GT-i9300i users.

Wipe data/factory reset.
This will delete all your data on your phone.
You may consider backing up your phone data or take a nandroid backup.

Select the Install Zip from sdcard option.
Select the CyanogenMod ROM zip and then followed by the GApps zip file.

The flashing may take a while.
When it will be done you can reboot your system and enjoy the Cyanogenmod 12 Android Lollipop on your device.

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23 February 2015 at 07:25 delete

I find that my battery depletes rapidly when it hits the 70% mark. I've also come across alot of bluetooth issues. i.e streaming to my Bose SoundLink Mini. It becomes increasingly hot when using applications such as: Clash of Clans & Facebook. This isnt as regular amount of heat, it gets to the point where i have to stop and pull apart the phone to manually cool the battery and body of the phone. It also has an issue where by if i have WiFi turned on, it blocks all communication with my cellular data. I was able to counter this by simply turning it off. Though with the already known issue of GPS, this isn't really a viable option. I absolutley love the overall feel of the ROM and i would love to have these issues fixed so i can use this phone and software as my daily driver. All the issues highlighted above are issues i did not run into when using my previous ROM which was a nightly cm11 build. Please Update and fix so i can recommend!

Ashley Halcomb
Sydney, Australia.

6 March 2015 at 13:57 delete

Thanks Ashley for the great review.
Actually I am not the core developer of this ROM but don't worry I will keep you posted latest updates for your concerns and solutions for them.

Here I have a lil update for you. You just try once with this ROM and let us know how this goes:

8 March 2015 at 19:55 delete

I tried this for a few minutes ago and it didnt work like a charm, no keyboard and no bluetooth. And i had a problem to launch Super SU.

/Daniel Nilsson Sweden

9 March 2015 at 01:06 delete

Download the Latest SuperSU file from the below link and flash it through recovery:

I think you might not have done the Data wipe or factory reset while upgrading the ROM.
If you have done so and still you face this kin of problem then I would like to request you to do that again and then re-flash the ROM.

Before flashing it again make sure that you have a backup of your precious data.

9 March 2015 at 01:11 delete

Also you can try with this ROM from the below link:

9 March 2015 at 16:57 delete

Thanks Infysim, I will give it a shot next weekend when i have time to play around with the phone :-D

24 March 2015 at 04:54 delete This comment has been removed by the author.
24 March 2015 at 04:55 delete


Having the same issue as Daniel i.e no keyboard. Running CWM wipe data/factory reset, wipe dalvik cache and wipe cache partition. Have updated to latest version of SU and installed Gapps 5xx