how to ROOT samsung galaxy s4 mini duos 19192xxubnb1 ? i want root only..no ROM. topic

i have a samsung galaxy s4 mini duos 19192XXUBNB1 and i want a root only.. i dont wanna installe a custom rom or any.. is there a guide or any link u can tell me.. coz i already read tons of threads and pages.. still cant find a post saying they succesfully root there samsung galaxy s4 mini duos 19192xxubnb1.. im asking for u help.. plss show me how... already read about kingo towel saferoot framaroot.. bt nothing points out 19192xxubnb1.. i want only root.. not a custom firmware wid pre root... thanks in advnce.. hope u can help me guys..