This video will show you oh how to root your huawei smartphone or device, easy to follow, step by step.
for huawei Y6 II CAM-L21 here's the link for TWRP and SuperSU
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link: https://forum.xda-developers.com/android/general/rooting-huawei-y6-ii-cam-l21-t3501162
Just follow my steps and be careful for every move to your device, because when something goes wrong, chances are your device will become softbrick, but don't worry there's a solution for that, i have a video for the softbrick huawei smartphone solutuion.
I hope you enjoyed this video, and i hope it helps to you.
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Thank you very much and God bless.