trojan virus i need help to remov it

[chetan pukle]

I dont know how its come but i want to remove its show always advertising in screen my mobile always connected with wifi so always video advertising play

This four file are loded with trojan ..

4 time factory reset kiya tabhibhi trojan ny gaya plzzzz help me ... n give a reply fastly ....
I cant use my mobile its always showing adult advertis also ..

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