Dual Boot N910F Snap Dragon Variant
I am using this on SM-N910F Snapdragon Variant of the Note 4, I don't know whether this will work with some other Note 4 Variant.
Download the most recent snapshot release of Dual Boot Patcher and install it on your Note 4.
In Dual Boot Patcher go to ROMS and you will see your Primary , press the 3dotmenu key and click "set kernel".
Choose Samsung Galaxy Note 4 from the drop menu.
Now you will have to patch CyanogenMod ROM and Gapps to make them perfect for dual booting.
In the Dual Boot Patcher application select patch zip file (CM12) and now find the ROM and patch.(Repeat this same step with Gapps)
Now you need to download /Install Dual Boot Apk by @rlorange. After installation launch and wait to finishing loading then close patch.
Now Copy Patched ROM to Sdcard/Patchmultiboot/Dual, And launch Dual boot from App drawer.
Now you should see the CM 12 Patched ROM loaded in Dual as shown in the below screenshot, Click on the File and wait for the patching to completed. Once completed successfully then you should see Patched file Moved from Sdcard/Patchmultiboot/Dual to Sdcard/Patchmultiboot/Patched_files Repeat this same step with Gapps.
Now Boot into recovery and Flas the files ROM and Gapps files from Sdcard/Patchmultiboot/Patched_files, Now your device will boot into New Rom.
Go into the Dual Boot Patcher app and set the kernel for your second ROM.
Use Swap Roms to switch between Roms.
Note: During installation of ROM if Recovery Freezes at chroot environment then follow this:
In side patched ROM.zip now you will see Multiboot/info.prop
Open this and edit the last line and the last line should look like this.
I've removed "#" and at the end replaced with dual.
I've used zproarchiver from mobile to edit this I recommended you also to do use thus or in PC use winrar I don't recommend extracting the ROM completely.
Dual Boot Setup
I have requested @chenxiaolong to provide support to N910G and he told it should be up soon.
Thanks for such a Quick Response and adding support to our device N910G @chenxiaolong
Original Thread: http://forum.xda-developers.com/showthread.php?t=2447534