S21FE network 🛜 issue

I'm also using S21 FE and haven't encountered any such issue. Please try checking your wifi settings or if it's mobile network then try reinserting the SIM card properly.
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Check network coverage of your sim in your area

I'm using S21 FE 5G.
At first i hve faced same issue n after reset one of my Sim was not detecting.
Sim slot was perfectly working Sim is perfectly working but in my device my that one sim not detected.
In other device it perfectly works even other sim were perfectly works in my device 🥺 don't reset so many times

I am also facing network issue on Jio other phones getting clear voice on calls in my village but S21 fe struggling.

Dear Samsung Member,

Greetings from Samsung Customer Support!

We apologize for the inconvenience you are facing. We understand your concern and will help you resolve this. Kindly follow the below steps to resolve your issue:

Check device network mode settings
Please follow the below steps.

Step1: Navigate to apps screen and tap on Settings.
Step2: Tap on Connections.
Step3: Tap on Mobile networks.
Step4: Tap on network mode SIM1 or SIM2.
Step5: Select network mode.

Note: We recommend to set device network mode as LTE/3G/2G or 5g (auto connect) mode.

Check network operator settings
Kindly set device network operator as "Automatically".

Please follow the below steps.

Step1: Navigate to apps screen and tap on Settings.
Step2: Tap on Connections.
Step3: Tap on Mobile networks.
Step4: Tap on Network operators.
Step5: Select automatically.
Note: We recommend to set device network operators as LTE/3G/2G (auto connect) mode.
Step6: Tap on OK.
Step7: Registered on network.

In case the issue still occurs. Please register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report).

Thank you for writing to Samsung.

Warm Regards,
Samsung Customer Support