Is a Nano SIM card necessary to get the camera to work?

If you want to view the camera live stream, check recordings on the CamHipro software, then a Nano SIM card is necessary. If you only need the camera to record motions, you can just insert a micro SD card into the camera, but if you want to view the video on the micro SD card, you need to connect the micro SD card to the computer via a card reader.