Unable to select mobile data

if u have dual Sim than you can select or choose.i can clear see there is only one simple so how u can choose between sim

Edit the tiles
Select pen symbol above the Bluetooth.
Add required tiles (find mobile data tile) from the group of tiles. Select done.

Dear Samsung Member,

Greetings from Samsung Customer Support!

As per your concern, we would request you to kindly perform the following steps to resolve your issue.

● Kindly check the device in different locations/network coverage areas.

● Check Mobile Network: Settings> Connections>Mobile networks> Network mode> Select 5G/LTE/3G/2G (auto connect).

● Check Network Operator: Settings> Connections> Mobile networks> Network operators> Select automatically.

● Kindly check the same SIM card in another phone or another SIM card in the same phone to verify the issue.

● Kindly try to contact the service provider once.

● Update device software (If available): Settings > Software update > Download and install > Checking for software update > Software update available > Download > Downloading updates > Install now.

● You can reset your device by following the steps from the below link.
https://www.samsung.com/in/support/mobile-devices/samsung-galaxy-mobile-how-to-perform-a-factory-reset/

In case the issue still occurs, kindly visit the service center for a physical inspection of your device. You can locate your nearest service center with this given link: https://www.samsung.com/in/support/service-center/

Warm Regards,
Samsung Customer Support