Dear Samsung Member,
Greetings from Samsung Customer Support!
Apologies for the delay in response. However, understanding the criticality of the situation; we had to ensure the wellbeing and safety of our employees which led to the delay in response.
Hope your issue is resolved. In case the issue still persists please follow the below mentioned steps.
1. Check device network mode settings
Settings > Connections > Mobile networks > network mode SIM1 or SIM2 > network mode.
2. Check network operator settings
Settings > Connections > Mobile networks > Network operators > Select automatically > OK > Registered on network.
Note: We recommend to set device network operators as LTE/3G/2G (auto connect) mode.
For further assistance, register your concern in Samsung Members Application (Open Samsung Members Application > click on “+“icon > send feedback > error report/ask questions).
Thank you for writing to Samsung.
Samsung Customer Support