Solar 3g/4g camera to cellular phone

What's the operational principle of solar 3g/4g camera? When we break down what you need to know, you will find the remote monitoring system is actually is very ordinary and it's a little bit innovative as well. Each IP camera is with built-in 3g/4g modems, same working principle as cell phone. These 3G / 4G modems make use of the cellular communication systems which allows you to send video back to your central location when WiFi or hardwired internet channels are not available. 3g/4g band and frequency will be presetted according to your local carrier. These modems can automatically identify your 3g/4g signal and select an alternate communication channel such as WiFi or hardwired internet solution to maintain a reliable and redundant connection.