I managed to root my ZTE Kis PLus with Cydia Impactor
Enable USB debugging first
Build number is GB_P752V_TGRV1.0.0B02
Stock rom for this phone is Support - KIS PLUS(Cosmote)Greece
You know any custom rom or kernel about this device?
No. unfortunately I don't know any other rom or kernel for this device. Maybe this thread  from modaco help you.
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