As Salam walakum

maray pass q mobil a 700 hy my jb call karti ho tu us ki screen black ho jati hy our my apni marzi sy call disccount nahi kr sakhti kio ky screen my kuch nazar hi nahi aata screen lock ho jati hy jb tk samnay wala discount na karay call end nahi hoti kisi ky pass is ka hall hy tu bata dy plz