Hello, experts. I have a question. After installing the 5G module and SIM card on the R4-Pro, the functions are operating normally, but the LED（SIM1） corresponding to the SIM card is not lighting up. What could be the reason for this?
Hello, experts. I have a question. After installing the 5G module and SIM card on the R4-Pro, the functions are operating normally, but the LED（SIM1） corresponding to the SIM card is not lighting up. What could be the reason for this?