Dear Samsung Member,
Greetings from Samsung Customer Support!
To resolve "network" issue please follow below given steps:
1. Reset Network Settings:- Go to apps screen >Settings >General Management >Reset >Reset Network Setting.
2. Reset the device: -Kindly create data backup of your device via SMART switch mobile application or http://www.samsung.com/in/support/smartswitch pc suite.
Tap on Settings>Tap on General Management>Tap on Reset.
If the issue still persist, kindly register your concern in Samsung Members app (Samsung Members app > Get help > Feedback > Error report/ask question).
Note: Please send device log files within 15 minutes of issue occurrence along with the exact issue details.
Thank you for writing to Samsung.
Samsung Customer Support