CRR-609 [How to] PROPER ROOT ON MM B321 [survive to data reset, too!]

Easy!
[First of all need to be on MM B321 and to have unlocked the bootloader, there are many guides in Xda and you can use them....]

So here we are:

You need:
1 - TWRP: http://ift.tt/1sE2BSI
2 - SuperSu 2.62 -systemless-: http://ift.tt/1sE2yq2
3 - SUperSu (Xbin): http://ift.tt/1sE2TZA
4 - UnSu (evebnutally something is wrong): http://ift.tt/1sE2QND

It' easy:
1 - Flash (if not present in your Mate S) TWRP recovery;
2 - Reboot in TWRP;
3 - Flash Supersu 2.62 systemless;
4 - Reboot system;
4 - Reboot in TWRP;
5 - Flash Supersu 2.52 xbin;
6 - Enjoy!!!

You can even reset data and Root will survive!!
If you have any trouble(bootloop) you can flash Unroot from TWRP and will boot again.

I am not responsible for damage to your mateS . everything you do at your own risk

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