[Galaxy Note 3 General] A.N.Droid:
this is maybe nothing new to many of you and will hopefully become obsolete soon, but i thought i post it anyway.

it´s probably already written elsewhere on xda, i don´t know.

this is not an elegant way to do it, but it works.

be aware that both operating systems will share the internal storage (storage/emulated/0).

i´m not sure if this could cause any problems. maybe you can tell me ?

updates marked in green and yellow.

always make nandroid backups and maybe it´s not a bad idea to backup your internal storage too !

i´m not responsible for anything you do or not do !

flashing a kernel will raise your knox counter to 0×1 !

from the safestrap blog:

DON’T RESTORE A CUSTOM ROM-SLOT BACKUP TO THE STOCK ROM. THIS WILL MOST LIKELY BRICK YOUR PHONE.

if you uprade to 4.4.2 kitkat you can´t go back to to 4.3 no more because kk comes with a new bootloader. you can not dual boot a 4.3 and a 4.4.2 rom and you wont be able to use CM. i dont know if safestrap is compatible with 4.4.2 as i´m still on 4.3.

requierements:

safestrap, CM rom and kernel(flashable zip) that works on the rom, TW based rom and kernel(flashable zip) that works on the rom, microsd card, supersu(when coming from CM)

i´m using temasek's UNOFFICIAL CM11 BUILD and bobcatrom for this guide. did it with x-note and the official cm nightly also. if you get an error installing the nightly, remove the first line from the updater-script.

put the required files on your external sd card and follow the instructions.

coming from installed TW rom

:

1.install safestrap apk.

2.open safestrap app and select install.

3.reboot into safestrap and make a nandroid backup of your rom.

4.create a rom slot and set it active.

5.restore the backup you just made to that rom slot. (this way you can have any rom on a rom slot. safestrap doesn´t support aroma installer but you can restore backups of aroma based roms, that you installed with twrp to the "stock rom slot" first.)

6.(optional) reboot to see if everything is ok. your rom now boots from rom slot 1.

7.now that you have successfully "cloned" your rom, reboot to safestrap again.

8.set the "stock rom" slot active and wipe.

9.install CM to the "stock rom" slot.

10.reboot into twrp (not safestrap !) and flash CM kernel.

11.reboot your brand new CM and enjoy. for now, you can only boot into CM, safestrap and your TW rom are unreachable.

12.to make your TW rom boot again, reboot into twrp and flash TW kernel.

13.reboot. safestrap shows up again, enter recovery and set rom slot 1 active.

14.reboot. you are back to your TW rom.

from now on, whenever you want to switch between operating systems, just repeat steps 10 - 14.

you can not have CM on a rom slot, it must be on the "stock rom" slot !

this is how to do it:

coming from installed CM rom

:

1.install supersu (not superuser !). i used the flashable zip but downloading it from playstore should work too. (if you did just install CM and want to use the flashable supersu, reboot into CM one time and finish the wizard. flashing it directly after installing CM, without rebooting will result in system inconsistency.)

2.install the safestrap apk and open safestrap. grant su permission and select install recovery (if you dont get the supersu popup and safestrap shows "not rooted", uninstall safestrap and reinstall again). do not choose reboot to recovery from the safestrap app, just do a normal reboot.

3.reboot into twrp, flash your TW kernel then reboot. (if you don´t do this, safestrap wont show up as it does only work with TW kernel.)

4.safestrap splashscreen shows up. enter safestrap recovery and backup your "stock rom" (your installed CM).

5.reboot into twrp. wipe and install the TW rom of your choice.

6.boot into your brand new TW rom and install safestrap once again as you did in step 2. (skip this step if you are still able to enter safestrap recovery)

7.follow steps 3 - 14 from the TW route written above. on step 9 you do not install of course, you do restore your backup of CM.

you can of course do this with 2 or more TW roms too (without CM), you wouldn´t normally be able to install in safestrap (aroma!).

you just don´t switch kernels then.

if you flash with twrp often, there is a chance to get the efs corruption issue. if wireless connection are dead, your phone does some weird things and you do not have an efs backup, there is a fix in this thread.

have fun !

important !

even when you flash stock rom with odin, your rom slots wont be removed. you have to delete them first in safestrap recovery to get your full internal storage capacity back !