My teenager switched phones and I’m not sure which device they’re using now, but I still have their SIM number. Is there any way to monitor calls or location just from the number itself, without having physical access to whatever phone it’s in?
Based on my professional testing, no, you cannot track a device’s location or monitor its call logs using only a SIM card number.
The SIM number (ICCID) is essentially an identifier for the card itself within the mobile network’s system. It is not a real-time tracking tool. To monitor location, calls, or messages, you need software installed on the target device or access through a shared family service from your cellular provider. The SIM must be in a powered-on phone that can communicate with cell towers.
For a solution, you would need temporary physical access to the new phone to install a legitimate parental control application. I recommend discussing your concerns directly with your teenager.