CyanogenMod is a free, community built distribution of Android which greatly extends the capabilities of your phone.
Download: LINK
How to Install
* For 910F: Use TWRP for trltexx: LINK
* For 910G: Use TRWPR for trltedt: LINK
(I suggest to download the .img and flash that recovery image with the tool 'flashify' )
After that, flash the Gapps of your choice BUT MAKE SURE THEY ARE LOLLIPOP GAPPS !! And make sure the version is compatible with the Android version of the ROM (current version: Android 5.1.1)
If you come from Touchwiz, make sure to do a factory reset and wipe Dalvik cache.
The ROM is rooted already ! You just need to enable it, which can be done in the developer options. If you don't know how to see developer options: LINK
Again, this is very important: it is rooted already DO NOT ROOT IT YOURSELF !!! If you re-root the ROM with for example chainfire, you can expect all kinds of issue's and problems.
Changelog: LINK
FAQ:
Q: Help I can't install it, my recovery says "this is for trltexx but you are on trlte".
A: Use the correct recovery like pointed out above
Q: Do I need to factory reset/wipe everything when I flash a new nightly ?
A: If you were previously on CM12 I think you should be fine. However I suggest to always wipe cache and dalvik cache, if you only wipe the cache you ensure the system is not using old
stuff. If you however are experiencing problems that no one else seems to experience, a full factory reset might be an idea.
Q: Should I flash gapps every time I flash a new nightly ?
A: No, only the first time you need to flash gapps.
Q: Does this work for 910C, 910U, 910T or whatever other variant ?
A: No. This ROM is only for 910F and 910G. Some other Snapdragons like the 910T have a ROM out, but check those forums. Exynos users like 910C are still out of luck although someone is working on a very early alpha ROM for it: LINK
Q: Help my phone wont go into deepsleep.
A: This could be anything. To find out what's keeping your phone awake I wrote this small tutorial: LINK
Q: My phone sleeps well but still is draining too much battery
A: In your wifi settings in the top right corner you can pull down a menu. Click advanced and mare sure you have 'scanning always available' disabled. And then there are the usual things like in settings/accounts disable syncing for your accounts, don't enable any hardware features you don't use etc.
Q: Can I use a custom kernel with CM12 ?
A: Some might work. However we optimize things in the CM12 kernel specifically for CM12, so flashing a custom kernel might cause problems. So if you are on a custom kernel and reporting a problem with CM12, at least ALWAYS report that you've flashed a custom kernel when posting about some problem you are experiencing !
Q: Does the S-pen work ?
A: Yes, the S-pen works right out of the box on Cm12, including hovering. If you're a heavy s-pen user and want functionality like for example making a cropped screenshot (just like in Touchwiz) you can enable that with a 3rd party app like: LINK
Known issue's:
* The CM messenger app doesnt send MMS correctly, use google messenger for MMS.
* Google camera sometimes doenst close correctly on CM12-1 and then will yield a 'cant connect to camera', I'd suggest not to use Google camera. All other cam apps work fine.
CM12 Known issue's (not specific to the note 4)
* Ringtones only work from internal SD card (not external sd card)
* Hardware encryption not functionally
* Fingerprint sensor not integrated just yet.
Original thread : LINK
