We have been testing our nRF9151-based device with the nRF Cloud Multiservice sample program and had to debug some SIM-related issues. It turns out that the UICC slot was selected to be 2 (virtual slot), when it should be 0. After each power cycle, the UICC slot resets to 2. I would imagine there is a Kconfig option, something like "CONFIG_CSUS=0" that would configure the program to send the AT%CSUS=0 command, but I have not found such a setting.
How do I config the program to use the UICC slot 0?