Please reset network setting of both Sim one by one and than reset all settings of your's device in general management settings also Flight ✈️ mode on n off one time, restart your's device without any Sim in slots, interchange Sim in slots also turn off power saving mode also reset wifi and Bluetooth settings also go to wifi setting and click on intelligent wifi then try to it's again. If you like please accept as a solution it's help to others users also, click on 3dots in my reply section and click on accept solution. Thanks.
We would request you to kindly perform the following steps to resolve your issue.
Please follow the below steps: 1: You can try to restart your phone. 2: First, we need to determine whether the error is with the SIM card or the SIM card slot, and You will need to prepare either another phone or another SIM card to perform this.
Either one of the devices will determine the possibility of the issue.
1- Existing SIM card with another phone. If Detectable, Possible, the existing phone's SIM Slot may be faulty. Please send it to the nearest service center. If not Detectable, Possible, that the SIM card is faulty. Please refer to the Telco provider. 2-Existing phone with new SIM Card If Detectable, the SIM slot is not faulty. This may be caused by an existing SIM card faulty. Please refer to the Telco provider. If not Detectable, Possible, the existing phone's SIM slot may be faulty. Please send to nearest service center.
Note. 1: Please restart the phone after changing the SIM card to allow the system to detect. 2: Kindly ensure both testing devices function well before testing.
Kindly contact your network service provider once to make sure there is no issue from their end.
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/
