Two questions from a n00b - Honor 7 Q&A, Help & Troubleshooting

Hello!
I am going to root my honor 7, but i have some clarification questions first. Hopefully someone could kindly help me.
So, this is the procedure:
Unlock Bootloader
Flash TWRP Recovery
Install SuperSu from TWRP
My questions are:
1 - Is there a way to check if the bootloader is just unlocked on the H7? (I remember the "hidden menu" from Xperias)
2 - If i want to update to MM when it will be released, i need to unroot B170 (is it enough to select "Unroot" from SuperSU app?) and flash stock recovery. Is this enough?
3 - why should i need the stock boot.img? What is it exactly? Is it the bootloader? Flashing stock boot.img back does it mean that simply the bootloader will be locked again?
Thanks so much for the clarifications!

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tonaz said:
My questions are:
1 - Is there a way to check if the bootloader is just unlocked on the H7? (I remember the "hidden menu" from Xperias)
2 - If i want to update to MM when it will be released, i need to unroot B170 (is it enough to select "Unroot" from SuperSU app?) and flash stock recovery. Is this enough?
3 - why should i need the stock boot.img? What is it exactly? Is it the bootloader? Flashing stock boot.img back does it mean that simply the bootloader will be locked again?
Thanks so much for the clarifications!
Click to expand...
Click to collapse
1 - I do not wish to check it now, but I remember if you reboot into bootloader there is a text indicating the status
2 - You need to have an unmodified system (and boot) for the OTA to work, so it could be safer to restore stock system.img and boot.img completely.
3 - I don't really know, hopefully somebody else will be able to answer. Last time I did an unroot+OTA upgrade, I did not have to restore stock boot.img.

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tonaz said:
3 - why should i need the stock boot.img? What is it exactly? Is it the bootloader? Flashing stock boot.img back does it mean that simply the bootloader will be locked again?
Click to expand...
Click to collapse
the boot.img contains the kernel, and this is sometimes modief during a system update, and different version dont wpork on a certain firmware
for example, b140 and b170 use same kernel, as the on-or kernel by @sminki works (almost, but probably) fine, whoever, for what i know, it doesnt work on b121, because the kernel is different,
the latest full firmware is b121, so to downgrade or to unbrick, you need to install b121, so the boot.img also needs to be flashed, if you want it to boot
i hope that will explain it better
also to root, you can use the multitool by @inside!out, if you are not confident, or just too lazy:
link
edit:
you are really a noob!
you asked three question, not two!
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*not meant to offend you in any way, and you are not a noob, as you know what root means*1
*1 not calling the people who dont know what root means noobs
it is hard to not make a joke, without offending someone on the internet

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thank you both so much for the infos!
Eheheh Yep i got the joke was fun

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themegaphoenix said:
it is hard to not make a joke, without offending someone on the internet
Click to expand...
Click to collapse
amen brother :silly:

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What about the bootloader? if i want to update via emui do i have to RE-lock it?
or maybe it will be re-locked automatically when reflashing stock boot.img?
last question, if i am rooted and unlocked, will i at least recieve the updates notification via emui?
thanks a lot. i am trying to study and get better "skilled" about android.