Samsung Galaxy S4 Mini is the younger sibling of the Galaxy S4. It runs on a 1.7GHz dual core Snapdragon processor, with 1.5GB RAM and 8GB internal storage (16GB in some regions). The 4.3″ Super AMOLED display has a resolution of 540×960. The S4 Mini runs on Samsung Touchwiz and comes with the standard suite of Samsung apps.
The 3G version of the Galaxy S4 MIni has received the CM 12 custom ROM. This will update the device to Android 5.0.2. Besides this, you can get the unique features that are offered by the CyanogenMod team. Follow the guide below to install CM 12 on the Galaxy S4 Mini 3G.