Dear Samsung Member,
Greetings from Samsung Customer Support!
We understand your concern and will help you to resolve the issue. Be assured, to resolve Wi-Fi issue kindly follow below given steps:-
1. Forget the Network:-
Go to apps screen > Settings > Connections > Wi-Fi > Wi-Fi network > Tap and hold the Wi-Fi network that you're having trouble with until the menu allows you to select Forget Network.
2. Reset Network Settings:- Go to apps screen > Settings > General Management > Reset > Reset Network Setting.
Please be assured and to resolve "Bluetooth connectivity" issue kindly follow the given below steps:-
1. Safe mode:- Power off the device > Press and hold the Power key for one or two seconds to turn on the device > When the Samsung logo appears, press and hold the Volume down key.
Note :-To exit safe mode restart the device .
2. Clear cache and data of Bluetooth app data:- Settings >Apps >Menu (Three dots) >Show system apps >search and type "Bluetooth" >Bluetooth >Storage >Clear cache >Clear data >OK.
3. 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 contacting Samsung.
Samsung Customer Support