1- Hard reset the device (Power + Volume UP + Menu)
2- Download the Samsung Bypass tool in Pendrive.
3- Connect the phone to OTG cable.
4- USB storage file will appear at phone.
5- Click on APK file.
6- Open with Package installer.
7- Installation blocked. Go to Setting and click on installation from Unknown source.
8- Install the APK file.
9- After installation, open the App.
10- You will be in Setting of your phone.
11- Select Back up & Reset-> Factory data reset ->Reset device -> Delete All.
12- Phone will restart.
13- Now, your phone will not ask for Gmail.
DONE....
2- Download the Samsung Bypass tool in Pendrive.
3- Connect the phone to OTG cable.
4- USB storage file will appear at phone.
5- Click on APK file.
6- Open with Package installer.
7- Installation blocked. Go to Setting and click on installation from Unknown source.
8- Install the APK file.
9- After installation, open the App.
10- You will be in Setting of your phone.
11- Select Back up & Reset-> Factory data reset ->Reset device -> Delete All.
12- Phone will restart.
13- Now, your phone will not ask for Gmail.
DONE....