Multiboot multiple OS on Note 8 after January update that changes bootloader

[AOC1]

Max Weinbach posted on https://www.xda-developers.com/samsung-galaxy-s8-note8-bootloader-odin/ that Samsung 8/8+/Note 8 January update come with a new bootloader that
1) can not downgrade your phone after installing this
2) block Prince Comsy’s modded Odin.

Max wrote one consequence is: "Note8 owners with the carrier Note8 devices cannot flash the US unlocked firmware. If you try to flash the carrier unlocked firmware on carrier phone, it will hard brick your phone". But later make this correction as an EDIT: After being tested by XDA Senior member me2151, it turns out cross region flashing does work. Prince Comsy Odin is working, but we can not test if the factory binary flashing will hard brick your phone. So flashing US unlocked onto a US carrier device should work.

I will like to buy a Note 8 and what I want to do is have 2 (or more) ROM (OS) and be able to multi boot. I have 4 questions regarding this. With the January update can I use multi boot ROM (MultiROM, DualBootPatcher, or any other) on:
1) The Unlock International Version (install the T-mobile ROM and other ROMs)?
2) The Unlock US Version (install the T-mobile ROM and other ROMs)?
3) The T-Mobile (Snapdragon) version (Install US unlock version ROM and other ROMs)? As far said here: https://www.androidauthority.com/samsung-galaxy-note-8-update-805328/ the T-mobile Janaury update is not out yet for T-Mobile, so a T-Moile Note 8 is not supposed to be affected by it.

The 4th questions is: Lets said I have T-Mobile Note 8, Im succesfull installing a multi boot, I have 3 ROMs simulstaniously. ROM 1 is the T-Mobile ROM that came with the phone, ROM 2 is Unlock US Note 8 ROM and ROM 3 FireFox OS. Everything work fine. Then After that, came out the “January” update for T-Mobile and I installed (because I need to be protected by the vulnerabities if fix). But the update change the bootloader. The question is> Will I be able to multi boot the 3 ROMs, like was doing before instaling the update? Or the 2 non carrier ROMs will be affected by the boot loader change made by the update, and the T-mobile phone will only able to boot to the original T-Mobile ROM that came with the phone? Or when the update change the boot loader will mess (probably brick) the whoe phone not letting me to boot what ever ROM it have (the T-Mobile and and the other 2 ROMs)

 

[tardisguy]

 

[SICKMADE]

I'm sorry not meaning to sound rude but I almost fell asleep midway through reading your post... 1st of all from what I gathered your buying a international note 8? And then want to flash multiboot which I personally only used when running touchwiz Rom and say a ASOP Rom if you will... but you need to keep in mind that your not gonna find too many roms over here on the snapdragon devices. I will tell you if you want to utilize multiboot then don't buy a Samsung. I used multiboot on my LGv20 having stock rooted as my daily and Lineage as my 2nd.

 

[AOC1]

I'm sorry not meaning to sound rude but I almost fell asleep midway through reading your post... 1st of all from what I gathered your buying a international note 8? And then want to flash multiboot which I personally only used when running touchwiz Rom and say a ASOP Rom if you will... but you need to keep in mind that your not gonna find too many roms over here on the snapdragon devices. I will tell you if you want to utilize multiboot then don't buy a Samsung. I used multiboot on my LGv20 having stock rooted as my daily and Lineage as my 2nd.

I was told that Snapdragon Note 8 (US unlock and US carrier) does not have unlocked boot loader, therefore is impossible to multiboot.

The question is if the Exynos model could be used to multiboot?

 

[JEFFSGTP]

The #1 reason I decided against the international model was issues with Carrier Aggregation I even asked the question in this forum and the international forum about if any fix had been found...I just wasn't willing to shell out that kind of money and not have the phone work properly switching between towers. I went with a US unlocked version...should be here Thursday.

in regards to multi-boot...I believe that would be processor dependent (someone please correct me if I am wrong.) and thus you would need to inquire in the international forum if there is a multi-boot for the exynos chipsets.