How to Root Qmobile i6i with Custom Rom?

Hello Guys,
Do anyone know how to Root Qmobile i6i with Custom Room.Please share the full Procedure along with Screenshots Thanks :):):)

I have QMobile z8 and I have a problem from 2 days

in my androib kitkat version facebook youtube videos is not playing and when i open every app like gallery music qapps all are showing unfortunately has stopped and also when i call from messenger imo wechat etc all are showing unfortunately has stopped and when i on off my mobile it take a lot of time and when mobile is on wifi is not working after 2 or 3 minutes its work and finally it is also not accepted sim card
I reset format my mobile 5 or 6 time but it doesn't work

QMobile Z10 marshmallow upgrade

Dose anyone know how to upgrade QMobile Z10 from Lollipop to Marshmallow?

Qmobile Lt700 Flash compatible cwm twrp recovery and fastboot driver.

Dear sir, brother i want to flash cwm recovery into LT700 but i am unable to do. becuase not such type of cwm recovery, twrp recovery and Philz recovery found. it is also not detected by mtk droid tool 2.5.3. it may be of mtk6735 devices and this version of 2.5.3 may not be supported to lollipop and also i have lot of serached to find the fastboot driver for lt700 but all tries are effortless. and window 7 is also unable to install it automatically. my Qmobile Noir lt700 have a lollipop version 5.0