seems so....have a look here: http://forum.xda-developers.com/oneplus-3/development/wip-multiboot-project-oneplus-3-t3410031So this only works when you decrypt your device?
Sent from my ONEPLUS A3003 using XDA-Developers mobile app
"#since this is a work in progress please do consider having a look here
1. If you update ramdisk and reboot then the phone will reboot to recovery and not boot to rom. You will have to reflash your rom for it to boot.
2. Lots of other issues.
3. Encryption isn't supported so if you want to try this. I recommend that you decrypt your device till encryption support arrives."