CyanogenMod is a custom ROM for Android devices. It’s free, and it extends the capabilities of your device with themes, dramatically improved privacy functionality, and all sorts of UI/UX tweaks. If you have a rooted device, installing CyanogenMod is incredibly easy. The CM team created an app calledCyanogenMod Installer that lets you download and flash the ROM with minimal technical knowledge. We will walk you through it here. Be sure to backup your data before you proceed. For"How to Install CyanogenMod 12"