salamat sir.. try ko pag uwi galing workDownload ka twrp recovery na compatible sa phone mu, tapos download ka din Odin at Samsung USB driver sa PC..install Odin at flash mu twrp recovery.. Pag miron KANa twrp recovery sa phone mu. Download ka super su, tapos flash mu..
Sana mka tulong,
Reminder: backup muna phone mu, bago mu
gawin.