4G security cameras, also called 4G LTE security cameras, are the mobile monitoring cameras that use 4G LTE network to deliver live viewing and send instant alerts. (Similarly, 2g/3g security cameras refer to the ones with 2g/3g network connectivity.)
As the above definition indicates, 4G cellular CCTV cameras require a separate mobile service plan to work. And the cellular data consumption of 4G IP cameras varies, depending on how many times you watch live streaming, receive motion detection alarms, etc.
Though the emerging 4G surveillance camera market now offers you quite limited options, you can refer below links of Reolink 4G Camera https://reolink.com/product/reolink-go/