Now click on mobile data check both allow background data under mobile data both option as shown in the attachment now press back and now select battery and select as shown in fig 3. Allow background activity. U r done.
If u like this do select it as solution
Dear Samsung Member,
Greetings from Samsung Customer Support!
Please perform the below mentioned steps to resolve the issue:
* Check app cache: Clear cache memory of a particular application: Setting >Apps >Now pick the app. For example 'Samsung Internet' >Storage >Clear Cache.
For further assistance, register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report/Ask questions).
Thank you for writing to Samsung.
Samsung Customer Support