[Q] [HELP] Root WIKO Rainbow UP 4G - Android Q&A, Help & Troubleshooting

I got this phone and I want to root it, but I don't know how to do it.
Is there any clone of it so that I can find a method ?
It is a MT6735 based phone, Mediatek Quad-Core 1 GHz, Cortex-A53, Lollipop 5.1
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Please any help welcome

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Hi everyone,
This topic is probably outdated, but i recently did a few research in order to root a Wiko Rainbow UP 4G with Android 5.1, like mega180 asked.
From what i found (every info is not fresh), the easy way to do this is to use Kingroot v4.8.0. I tried it and, yes, it works. But you have this app stuck on your phone, and you may want to get rid of it. I read that the app superSume Pro is good for this, but it's not free and i haven't tried it myself (yet).
I might have found an less easy way to get the root, which is the following one. Please correct me if you read something false, as i'm quite new in the Android game, i don't have a strong understanding of everything. So, if you :
1) unlock the bootloader
2) install a custom recovery like TWRP
3) flash Super SU
... it should do the job, right ?
So step by step :
<> Step 1 - Unlock the bootloader
For this, a simple fastboot oem unlock command should work. For those who would not know, please note that this will erase all the user's data (and that is a good thing). By the way, i looked into a ROM with a method similar to this one (thanks to this article and its author !), and fyi that's the OEM commands we can find inside :
Code:
oem p2u
oem reboot-recovery
oem append-cmdline
oem off-mode-charge
oem unlock
oem lock
oem key
oem lks
I'm note sure to get the purpose of every command here, like "oem lks" for instance, if you have any information to share ...
<> Step 2 - Install a custom recovery
I found on a french forum that a version of TWRP had been released for the Rainbow UP 4G, but the links provided to download it are dead today. Has anyone heard about that ? There is nothing about Wiko phones on the TWRP website. Once you have it just do a fastboot flash recovery your_custom_recovery.img and that's it, i guess.
<> Step 3 - Flash Super SU
All you need is the Super SU flashable zip, but ... on the website, the links are (also) dead ! With this file, simple flash it with TWRP and you will succeed.
If that is ok to get root access, the only things i miss to try it are these files that must exist somewhere ... so any help will be welcomed. And if all this post is full of stupidities and i'm completely wrong, i'll be glad to know it too !
Thanks for reading !