For those of you looking to try experience the latest Android 5.1 Lollipop today, you are in luck as there’s several Android 5.1 custom ROMs floating around. Of all the ones I’ve tried so far, I can recommend you the CM Remix ROM, which comes with latest Android 5.1 and root.
The CM Remix ROM is a custom AOSP ROM (What is AOSP?), so you will lose all of your Samsung TouchWiz features like heart rate monitor, IR blaster, etc…etc… This ROM is really for those of you who want to convert your Note 4 into a full-fledged Nexus device and anyone who wants to try Android 5.1 (you can make a backup ROM then try the ROM, restore ROM after trying).
The CM Remix ROM is a beast when it comes to performance, both in benchmarks (I got near 52,000 on Antutu) and real life. The UI is so fast, you will love how fast your Note 4 runs after installing this ROM.
Of course, CM Remix ROM comes loaded with more features than you can ask for, you can expect every AOSP feature you’ve tried before to be on it including full status bar, notification drawer, sounds, display, lockscreen, and button customizations. Also there are nifty features like App Circle Sidebar, App Sidebar, Viper4Android, and much much more.