The custom ROM, CyanogenMod 11 is based on Android 4.4.2 KitKat update and is currently compatible with the I8190 and I8190N models of the Samsung Galaxy S3 Mini.
Users of Samsung Galaxy S3 Mini should not expect to get the official Android 4.4.2 KitKat update, as Samsung recently stopped its software support for some Galaxy devices such as the S3 and the S3 Mini. But thanks to Android custom ROM developer NovaFusion, Samsung Galaxy S3 Mini can still be upgraded to Android 4.4.2 KitKat update.
Below is the list of features to find after installing Android 4.4.2 KitKat update on Samsung Galaxy S3 Mini via the CM11 ROM, grabbed from a post on International Business Times.
Complete CM11 features
CPU Sleep Mode
Bluetooth 4.0 with LE support
Graphical tearing fixed
Camera and Video working
BLN (Backlight Notification)
WIP OTG Support
3.0.101 Linux Kernel Support
GPS and A-GPS tweaks
Visit this IB Times post to learn the detailed process on how to install Android 4.4.2 KitKat update on Samsung Galaxy S3 Mini via the custom firmware CyanogenMod 11.
But before proceeding with the actual installation process, there are some requirements that should be satisfied first:
Check the model number of the Samsung Galaxy S3 Mini you own. Go to Settings > About Phone > Model Number to verify if it is one of the aforementioned models that can be installed with Android 4.4.2 Kitkat update via CM11 ROM.
Make a backup of the data and settings stored on the phone using ClockWorkMod or TWRP.
The Samsung Galaxy S3 Mini needs to have 80 percent battery level or more before proceeding to install Android 4.4.2 KitKat update.