Mobile data usage while calling in S23

This happens when there are two sims , it is not a problem
You can connect a wifi network to access internet connection while calling
You can also turn on wifi calling

Please kindly check that the "Use Internet while calling" option is on.

"Setting > Connection > Sim manager > Data switching and backup calling"
Turn it on!

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.

Check Settings: If mobile internet is not working during the call, then check settings 'Use internet during call', Please follow the below steps to enable 'Use internet during call': Settings> Mobile Networks> Use internet during call> Enable it, if disabled.

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.

Check Data Roaming: Settings> Connections> Mobile networks> Data roaming to enable it, if disabled.

Reset network settings: Settings> General management> Reset> Reset network settings> Reset settings> Unlock your screen> Reset.

Check another network operator SIM: If the issue has not been resolved, then get in touch with the network operator and try to check with another network operator SIM.
Note: kindly contact your network service provider once to make sure there is no issue from their end.

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

Mobile data can be turned on while calling if you have only one sim .
Try it remove one sim and you will find out that if there is only one sim then mobile data will still be turned on while you are calling. It works then you can put the another sim on another phone which you use only for calling and not for internet connection. This will increase the weight on your pocket , so you can use a keypad phone for calling purpose only.
This happens in almost every smartphone😬😬😀👍👍

In s 23 ultra When I am calling internet is getting off...how to solve this issue

Use mobile data while calling in s23