How To rpair imei j730f u3 fix null null samsung galaxy j7 pro 2017

Free method binary 3 fix network problem
only flash by
Free EFS J730F U2 FIX MOUNT EFS FAIL HANG LOGO PAYJOY
mdm j730f
 MODEM J730FXXU3ARI1
j730f 8.0 to 7.1 binary 3 fix touche screen
j730f 7.0 in download root
methode
1 download
j730f u3 downgrade modem
2 download
root j730f 
after only write efs by octoplus box or z3x
download here efs j730f rev3 repair imei
efs samsung g960f u3