Thank you for sharing your concern. We acknowledge your query and apologize for the same. And please follow the easy troubleshooting steps which might help to solve the issue.
a). Tap on Apps icon from the home screen. b). Tap on Settings icon. c). Select and tap on Sim card manager option from the settings. d). Drag the switch to right side to Activate SIM 2. e). SIM 2 will be activated as shown below.
In case the issue still occurs. Please register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Ask question).
Thank you for writing to Samsung. Warm regard, Samsung customer support
