samsung
B5512 dual sims always gives problem when try to hardreset with keys.....then
atlast have to go for flashing.........the problems extend when debuging option
not on.........in this case use fallowing way it is 100% testd
1= use one clack pattren unlock by Xcac
2= connect set with usb cable (in on condition)
3= install drivers if needed and select proper port
4= click Factery seting
5=no need to select any model
ur done

1= use one clack pattren unlock by Xcac
2= connect set with usb cable (in on condition)
3= install drivers if needed and select proper port
4= click Factery seting
5=no need to select any model
ur done

download
herw latast v.
.