I have posted a thread similar to this, but obvious the flashable framwork version 7.1 keeps on ending up in bootloop.
But no worries cause with this tutorial u can get it installed on Infinix X551 XUI 1N3.1. but you can try this on other device running lollipop 5.1
NB: Doing this is on your own risk, HOVATEK will no be held responsible for
any brick or bootloop.
In order for u to do this, you must have root acces nd custom recovery runing on your mobile.
> first download and install this
> secondly download and copy to sd card then install zip file using recovery mode
-boot into recovery volUP+Power
-install zip from sd card
- select xposed-v84-sdk22
> After install successfully
> Reboot device
> open the xposed app installed and enjoy modding.
Tested and trusted on X551 hot note 1gb+16gb.
Good luck and Thanks
Credits: XDA forum, BasedTechPortal